Merge pull request #1 from melug/master

fixed gcm payload
Include gcm urls
Clean up code
add unregister and return HttResponse 404 if failed to register/unregister
Add tests
Remove unnecessary files
Merge branch 'master' of https://github.com/ddwiyaksha/django-gcm

Conflicts:
	gcm/views.py
Use rest api instead of ordinary views
Add info about app
Add proper travis url
Update readme
Update readme
Add ability to easily override the form
Separate instance object
Bump version
Add info how to send messages
Added a json format send messagem to devices
Merge pull request #5 from leobragatti/master

Using the json format
Use only json format
Bump version