Added capability to log in via email

templates/login.html

@@ -2,13 +2,13 @@
 {% block body %}
   <h2>Login</h2>
   {% if error %}<p class=error><strong>Error:</strong> {{ error }}{% endif %}
-  <form action="{{ url_for('login') }}" method=post>
+  <form action="{{ url_for('login') }}" method="POST">
     <dl>
-      <dt>Username:
-      <dd><input type=text name=username>
+      <dt>Username or email:
+      <dd><input type="text" name="username">
       <dt>Password:
-      <dd><input type=password name=password>
-      <dd><input type=submit value=Login>
+      <dd><input type="password" name="password">
+      <dd><input type="submit" value="Login">
     </dl>
   </form>
 {% endblock %}