rename .html templates to .jinja2 for more consistency

templates/uploadinfo.jinja2

@@ -0,0 +1,23 @@
+{% extends "base.html" %}
+
+{% block title %}Info on file "{{ upl.name }}" - {{ app_name }}{% endblock %}
+
+{% block content %}
+<h1>Info on file "{{ upl.name }}"</h1>
+
+<div class="upload-frame">
+  <img src="{{ upl.url }}" alt="{{ upl.name }}">
+</div>
+
+<p>You can include this file in other pages with <strong>{{ '{{' }}media:{{ upl.id }}{{ '}}' }}</strong>.</p>
+
+<h2>File info</h2>
+
+<p>Type: {{ type_list[upl.filetype] }}</p>
+
+<p>Upload ID: {{ upl.id }}</p>
+
+<p>Uploaded on: {{ upl.upload_date.strftime('%B %-d, %Y %H:%M:%S') }}</p>
+
+<p>Size: {{ upl.filesize }} bytes</p>
+{% endblock %}