refs #218 - Tests and docs for rapidsms.contrib.default
refs #218 - Use self.apps to set router apps in tests
refs #218 - Removed override_settings for 1.3 compatibility
refs #218 - Nitpicks
Use rapidsms.tests.harness.setting
Use override_settings if it is available
refs #218 - Clarified information about routers + app loading
Merge branch 'master' of github.com:rapidsms/rapidsms into docs/contrib/default
refs #218 - Fixes based on comments from @copelco
Merge branch 'master' of github.com:rapidsms/rapidsms into docs/contrib/default

Conflicts:
	docs/index.rst
	docs/releases/0.12.0.rst
refs #218 - Router setting is now overriden in test router mixin
Merge branch 'master' of github.com:rapidsms/rapidsms into docs/contrib/default
Merge pull request #246 from caktus/docs/contrib/default

refs #218 - Tests and docs for rapidsms.contrib.default