diff --git a/app.py b/app.py
index 960e63a..0a8c01c 100644
--- a/app.py
+++ b/app.py
@@ -31,12 +31,8 @@ try:
     from slugify import slugify
 except ImportError:
     slugify = None
-try:
-    import markdown_strikethrough
-except Exception:
-    markdown_strikethrough = None
 
-__version__ = '0.4'
+__version__ = '0.5-dev'
 
 #### CONSTANTS ####
 
@@ -93,6 +89,28 @@ def _makelist(l):
     else:
         return []
 
+
+#### MARKDOWN EXTENSIONS ####
+
+class StrikethroughExtension(markdown.extensions.Extension):
+    def extendMarkdown(self, md, md_globals):
+        postprocessor = StrikethroughPostprocessor(md)
+        md.postprocessors.add('strikethrough', postprocessor, '>raw_html')
+
+class StrikethroughPostprocessor(markdown.postprocessors.Postprocessor):
+    pattern = re.compile(r"~~(((?!~~).)+)~~", re.DOTALL)
+
+    def run(self, html):
+        return re.sub(self.pattern, self.convert, html)
+
+    def convert(self, match):
+        return '<del>' + match.group(1) + '</del>'
+
+### XXX it currently only detects spoilers that are not at the beginning of the line. To be fixed.
+class SpoilerExtension(markdown.extensions.Extension):
+    def extendMarkdown(self, md, md_globals):
+        md.inlinePatterns.register(markdown.inlinepatterns.SimpleTagInlineProcessor(r'()>!(.*?)!<', 'span class="spoiler"'), 'spoiler', 14)
+
 #### DATABASE SCHEMA ####
 
 database = SqliteDatabase(_getconf("config", "database_dir") + '/data.sqlite')
@@ -321,6 +339,9 @@ class PagePolicy(BaseModel):
             (('page', 'key'), True),
         )
 
+# DEPRECATED
+# It will be possibly removed in v0.6.
+# Use external image URL instead.
 class Upload(BaseModel):
     name = CharField(256)
     url_name = CharField(256, null=True)
@@ -382,34 +403,11 @@ def init_db():
 
 #### WIKI SYNTAX ####
 
-magic_word_filters = {}
-
-def _replace_magic_word(match):
-    name = match.group(1)
-    if name not in magic_word_filters:
-        return match.group()
-    f = magic_word_filters[name]
-    try:
-        return f(*(x.strip() for x in match.group(2).split('|')))
-    except Exception:
-        return ''
-
-def expand_magic_words(text):
-    '''
-    Replace the special markups in double curly brackets.
-    
-    Unknown keywords are not replaced. Valid keywords with invalid arguments are replaced with nothing.
-    '''
-    return re.sub(MAGIC_RE, _replace_magic_word, text)
- 
 def md(text, expand_magic=False, toc=True):
     if expand_magic:
         # DEPRECATED seeking for a better solution.
         warnings.warn('Magic words are no more supported.', DeprecationWarning)
-        text = expand_magic_words(text)
-    extensions = ['tables', 'footnotes', 'fenced_code', 'sane_lists']
-    if markdown_strikethrough:
-        extensions.append("markdown_strikethrough.extension")
+    extensions = ['tables', 'footnotes', 'fenced_code', 'sane_lists', StrikethroughExtension(), SpoilerExtension()]
     if toc:
         extensions.append('toc')
     return markdown.Markdown(extensions=extensions).convert(text)
@@ -418,59 +416,9 @@ def remove_tags(text, convert=True, headings=True):
     if headings:
         text = re.sub(r'\#[^\n]*', '', text)
     if convert:
-        text = md(text, expand_magic=False, toc=False)
+        text = md(text, toc=False)
     return re.sub(r'<.*?>|\{\{.*?\}\}', '', text)
 
-
-### Magic words (deprecated!) ###
-
-def expand_backto(pageid):
-    p = Page[pageid]
-    return '*&laquo; Main article: [{}]({}).*'.format(html.escape(p.title), p.get_url())
-
-magic_word_filters['backto'] = expand_backto
-
-def expand_upload(id, *opt):
-    try:
-        upload = Upload[id]
-    except Upload.DoesNotExist:
-        return ''
-    if opt:
-        desc = opt[-1]
-    else:
-        desc = None
-    classname = 'fig-right'
-    return '<figure class="{0}"><a href="/upload-info/{4}"><img alt="{1}" src="{2}" title="{1}"></a>{3}</figure>'.format(
-        classname, html.escape(upload.name), upload.url, 
-        '<figcaption>{0}</figcaption>'.format(md(desc, expand_magic=False)) if desc else '',
-        upload.id)
-
-magic_word_filters['media'] = expand_upload
-
-def make_gallery(items):
-    result = []
-    for upload, desc in items:
-        result.append('<figure class="fig-gallery"><a href="/upload-info/{0}"><img alt="{1}" src="{2}" title="{1}"></a>{3}</figure>'.format(
-            upload.id, html.escape(upload.name), upload.url,
-            '<figcaption>{0}</figcaption>'.format(md(desc, expand_magic=False)) if desc else ''))
-    return '<div class="gallery">' + ''.join(result) + '</div>'
-
-def expand_gallery(*ids):
-    items = []
-    for i in ids:
-        if ' ' in i:
-            id, desc = i.split(' ', 1)
-        else:
-            id, desc = i, ''
-        try:
-            upload = Upload[id]
-        except Upload.DoesNotExist:
-            continue
-        items.append((upload, desc))
-    return make_gallery(items)
-
-magic_word_filters['gallery'] = expand_gallery
-
 #### I18N ####
 
 lang_poses = {'en': 1, 'en-US': 1, 'it': 2, 'it-IT': 2}
@@ -549,8 +497,7 @@ def linebreaks(text):
 def homepage():
     page_limit = _getconf("appearance","items_per_page",20,cast=int)
     return render_template('home.html', new_notes=Page.select()
-        .order_by(Page.touched.desc()).limit(page_limit),
-        gallery=make_gallery((x, '') for x in Upload.select().order_by(Upload.upload_date.desc()).limit(3)))
+        .order_by(Page.touched.desc()).limit(page_limit))
 
 @app.route('/robots.txt')
 def robots():
@@ -795,28 +742,11 @@ def listtag(tag, page=1):
 def media(fp):
     return send_from_directory(UPLOAD_DIR, fp)
 
-@app.route('/upload/', methods=['GET', 'POST'])
+# symbolic route as of v0.5
+@app.route('/upload/', methods=['GET'])
 def upload():
-    if request.method == 'POST':
-        name = request.form['name']
-        file = request.files['file']
-        filename = file.filename
-        ext = os.path.splitext(filename)[1]
-        content = file.read()
-        try:
-            upl = Upload.create_content(name, ext, content)
-            flash('File uploaded successfully')
-            return redirect('/upload-info/{}/'.format(upl.id))
-        except Exception:
-            sys.excepthook(*sys.exc_info())
-            flash('Unable to upload file. Try again later.')
     return render_template('upload.html')
 
-@app.route('/upload-info/<int:id>/')
-def upload_info(id):
-    upl = Upload[id]
-    return render_template('uploadinfo.html', upl=upl, type_list=upload_types_rev)
-
 @app.route('/stats/')
 def stats():
     return render_template('stats.html', 
@@ -881,7 +811,14 @@ def easter_y(y=None):
 
 #### EXTENSIONS ####
 
-active_extensions = ['contactnova']
+active_extensions = []
+
+_i = 1
+_extension_name = _getconf('extensions', 'ext.{}'.format(_i))
+while _extension_name:
+    active_extensions.append(_extension_name)
+    _i += 1
+    _extension_name = _getconf('extensions', 'ext.{}'.format(_i))
 
 for ext in active_extensions:
     try:
diff --git a/static/content.js b/static/content.js
new file mode 100644
index 0000000..53859c2
--- /dev/null
+++ b/static/content.js
@@ -0,0 +1,8 @@
+(function() {
+
+  for (let i of document.getElementsByClassName('spoiler')) {
+    i.onclick = function() {
+      this.classList.toggle('revealed');
+    }
+  };
+})();
diff --git a/static/style.css b/static/style.css
index 4dd390e..04ec6d3 100644
--- a/static/style.css
+++ b/static/style.css
@@ -1,13 +1,14 @@
 /* basic styles */
-body{font-family:sans-serif}
+body{font-family:sans-serif;background-color:#faf5e9}
 .content{margin: 3em 1.3em}
 
 /* content styles */
-#firstHeading {font-family: 'Oswald','Anton','Impact',sans-serif; text-align: center;font-size:3em}
+#firstHeading {font-family:sans-serif; text-align: center;font-size:3em; font-weight: normal}
 .inner-content{font-family:serif; margin: 1.7em auto; max-width: 1280px; line-height: 1.9; color: #1f2528}
 .inner-content em,.inner-content strong{color: black}
 .inner-content h1{color: #99081f}
-.inner-content table, .inner-content h2, .inner-content h3, .inner-content h4, .inner-content h5, .inner-content h6{font-family:sans-serif; color: black}
+.inner-content table {font-family: sans-serif}
+.inner-content h2, .inner-content h3, .inner-content h4, .inner-content h5, .inner-content h6{font-family:sans-serif; color: black; font-weight: normal}
 .inner-content h3{margin:0.8em 0}
 .inner-content h4{margin:0.6em 0}
 .inner-content h5{margin:0.5em 0}
@@ -19,6 +20,9 @@ body{font-family:sans-serif}
 .inner-content table > * > tr > th, .inner-content table > tr > th {background-color:#f9f9f9;border:#ccc 1px solid;padding:2px}
 .inner-content table > * > tr > td, .inner-content table > tr > td {border:#ccc 1px solid;padding:2px}
 
+/* spoiler styles */
+.spoiler {color: black; background-color:black}
+.spoiler.revealed {color: #1f2528; background-color: transparent}
 
 /* interface styles */
 .nl-list{list-style:none}
@@ -143,6 +147,8 @@ body.dark, .dark input, .dark textarea{background-color: #1f1f1f; color: white}
 a.dark-theme-toggle-off{display: none}
 .dark a.dark-theme-toggle-off{display: inline}
 .dark a.dark-theme-toggle-on{display: none}
+.dark .spoiler {color: white; background-color: white}
+.dark .spoiler.revealed {color: white; background-color: transparent}
 
 /* ?????? */
 .wrap_responsive_cells {
diff --git a/templates/edit.html b/templates/edit.html
index eb24311..b7a6089 100644
--- a/templates/edit.html
+++ b/templates/edit.html
@@ -56,4 +56,5 @@
 
 {% block scripts %}
 <script src="/static/edit.js"></script>
+<script src="/static/content.js"></script>
 {% endblock %}
diff --git a/templates/home.html b/templates/home.html
index f2643aa..c0d4691 100644
--- a/templates/home.html
+++ b/templates/home.html
@@ -7,7 +7,6 @@
 
 <div class="nl-new">
   <a href="/create/"><button class="submit-primary">{{ T('new-note') }}</button></a>
-  <a href="/upload/"><button class="submit-secondary">{{ T('upload-file') }}</button></a>
 </div>
 
 <h2>{{ T('latest-notes') }}</h2>
@@ -31,8 +30,4 @@
   <li><a href="/p/most_recent/">{{ T('show-all') }}</a></li>
 </ul>
 
-<h2>{{ T('latest-uploads') }}</h2>
-
-{# TODO security flaw; find a way to do this in a more safe manner! #}
-{{ gallery|safe }}
 {% endblock %}
diff --git a/templates/stats.html b/templates/stats.html
index 34ca3ae..1e7ee93 100644
--- a/templates/stats.html
+++ b/templates/stats.html
@@ -8,7 +8,6 @@
 <ul>
   <li>Number of pages: <strong>{{ notes_count }}</strong></li>
   <li>Number of pages with URL set: <strong>{{ notes_with_url }}</strong></li>
-  <li>Number of uploads: <strong>{{ upload_count }}</strong></li>
   <li>Number of revisions: <strong>{{ revision_count }}</strong></li>
   <li>Average revisions per page: <strong>{{ (revision_count / notes_count)|round(2) }}</strong></li>
 </ul>
diff --git a/templates/upload.html b/templates/upload.html
index 153c6f8..e3f2266 100644
--- a/templates/upload.html
+++ b/templates/upload.html
@@ -3,41 +3,19 @@
 {% block content %}
 <h1>Upload new file</h1>
 
-<p>Types supported: <strong>.jpeg</strong>, <strong>.jpg</strong>, <strong>.png</strong>.</p>
+<p>Uploads are no more supported. Please use this syntax instead for external images: <code>![alt text](https://www.example.com/path/to/image.jpg)</code>.</p>
 
 <form method="POST" enctype="multipart/form-data">
   <div>
     <label for="name">Name: </label>
-    <input type="text" id="name-input" name="name" required maxlength="256">
+    <input type="text" id="name-input" name="name" required maxlength="256" disabled="">
   </div>
   <div>
     <label for="file">File: </label>
-    <input type="file" id="file-input" name="file" accept="image/jpeg, image/png">
+    <input type="file" id="file-input" name="file" accept="image/jpeg, image/png" disabled="">
   </div>
   <div>
-    <input type="submit" class="submit-primary" value="Upload">
+    <input type="submit" value="Upload" disabled="">
   </div>
 </form>
 {% endblock %}
-
-{% block scripts %}
-<script>
-(function(){
-  function last(a){
-    return a[a.length-1];
-  }
-  
-  var fileInput = document.getElementById('file-input');
-  var nameInput = document.getElementById('name-input');
-  fileInput.onchange = function(){
-    var name = last(fileInput.value.split(/[\/\\]/));
-    if(name.indexOf('.') >= 0){
-      name = name.replace(/\..*$/, '');
-    }
-    nameInput.value = name;
-    
-    // TODO: add image preview
-  }
-})();
-</script>
-{% endblock %}
diff --git a/templates/view.html b/templates/view.html
index eb15f68..cf10fc7 100644
--- a/templates/view.html
+++ b/templates/view.html
@@ -5,29 +5,32 @@
 {% block json_info %}<script>window.page_info={{ p.js_info()|tojson|safe }};</script>{% endblock %}
 
 {% block content %}
-<h1 id="firstHeading">{{ p.title }}</h1>
+<article>
+  <h1 id="firstHeading">{{ p.title }}</h1>
+  
+  <div class="jump-to-actions">
+    <span>{{ T('last-changed') }} {{ rev.human_pub_date() }}</span> ·
+    <a href="#page-actions">{{ T('jump-to-actions') }}</a>
+  </div>
 
-<div class="jump-to-actions">
-  <span>{{ T('last-changed') }} {{ rev.human_pub_date() }}</span> ·
-  <a href="#page-actions">{{ T('jump-to-actions') }}</a>
-</div>
+  {% block history_nav %}{% endblock %}
 
-{% block history_nav %}{% endblock %}
+  <div class="inner-content">
+    {{ rev.html()|safe }}
+  </div>
 
-<div class="inner-content">
-  {{ rev.html()|safe }}
-</div>
+  {% if p.tags %}
+  <div class="page-tags">
+    <p>{{ T('tags') }}:</p>
+    <ul>
+      {% for tag in p.tags %}
+      <li><a href="/tags/{{ tag.name }}/">#{{ tag.name }}</a> <span class="tag-count">({{ tag.popularity() }})</span></li>
+      {% endfor %}
+    </ul>
+  </div>
+  {% endif %}
+</article>
 
-{% if p.tags %}
-<div class="page-tags">
-  <p>{{ T('tags') }}:</p>
-  <ul>
-    {% for tag in p.tags %}
-    <li><a href="/tags/{{ tag.name }}/">#{{ tag.name }}</a> <span class="tag-count">({{ tag.popularity() }})</span></li>
-    {% endfor %}
-  </ul>
-</div>
-{% endif %}
 {% endblock %}
 
 {% block actions %}
@@ -36,3 +39,7 @@
 {{ T('last-changed') }} <time datetime="{{ rev.pub_date.isoformat() }}">{{ rev.pub_date.strftime('%B %-d, %Y at %H:%M:%S') }}</time> - 
 {{ T('page-id') }}: {{ p.id }}
 {% endblock %}
+
+{% block scripts %}
+<script src="/static/content.js"></script>
+{% endblock %}