Use "message" instead of "msg" as the default data key.

Fixes #4
fixed wrong usage of 'chunks' in gcm_send_bulk_message
removed double usage of SETTINGS.get("GCM_MAX_RECIPIENTS")
Merge pull request #6 from randomknowledge/master

fixed wrong usage of 'chunks' in gcm_send_bulk_message
Add south migrations
Merge branch 'master' of github.com:Adys/django-push-notifications
pep8 fixes
Use file-wide imports
apns: Declare settings at the top
Small line length fixes
Fix migration depending on accounts.user.

Closes #8
Fix example usage in README
Add missing verbose_name to APNSDevice.registration_id
Update APNS documentation url
Add wheel support
Add python version classifiers to setup.py
Add __author__, __email__ and __version__ module variables
Release version 0.9. Upgrade to Beta.
Recommend installing from pip
Update README.rst