Use the Django WSGI_APPLICATION setting to setup the WSGI handler
Because the DJANGO_SETTINGS_MODULE needs to be set by the apps wsgi handler, that app should import application from here, and app.yaml should point at the app's wsgi handler
Massive code cleanup. REMOVING PYTHON 2.5 SUPPORT

Conflicts:

	djangoappengine/main/main.py

Signed-off-by: David Neale <david@potatolondon.com>
Switch to using a WSGI middleware for setting up Djangoappengine - this fixes a threading bug where DJANGO_SETTINGS_MODULE would get lost
remove advice in README saying to use djangoappengine for py25 compatibility.