Added a bunch of things ... too miscellaneous.
- Changed the models
- Changed forms to be compatible with models
- Added some good practices for deprecation in django 1.6
- Added winterns
- Added ajax
Merge branch 'master' of github.com:NSSatIITM/nss2k14
Added a bunch of stuff :
- Removed all TODO comments
- Fixed models to give a better overview of event <-> instance relation

Conflicts:
	apps/events/models.py