Django 1.5 WIP
move get_main_database() to mygpo.db.couchdb
move mygpo.couch to mygpo.db.couchdb

Conflicts:
	mygpo/api/advanced/__init__.py
	mygpo/api/backend.py
Merge branch 'django15'
remove deprecation warnings for django.conf.urls.defaults
use updated URLs package for registration backend
move mygpo.json => mygpo.core.jsony to avoid import confusion
fix tests for various utils methods
get_main_database() returned wrong results during test run
fix tests
remove deprecation warning for request.raw_post_data

the attribute is replaced by request.body
use class-based generic views instead of function-based