Upgrad the project to fits Django 1.5.x 

- Changed all the deprecated methods/packages to it equivalent in django 1.5, deprecated methods may be deleted on next django releases.
- Converted call on templates to responds to Django 1.5 syntax.
- Changed the index on legislation/views.py to use simple request instead of a query set, avoiding the use of list_detail which is deleted from Django. later we could substitute it by generic.view.list if needed