UI improvements

summary:
* use sekizai to handle inline js - (http://django-sekizai.readthedocs.org/en/latest/index.html)
* bootstrapify everything
* create & rename partial templates (partial templates begin with a underscore, it's more readable)
* redesign to the default(symfony) layout
* move the moderator menu to the navbar
    
known issue:
* the 'list unapproved' menu item is only shown on the index page
 * problem: the is_moderator is not global available