basic dependency graph calculation in place
Merge branch 'content_schema' of https://github.com/metacademy/metacademy-application into content_schema

Conflicts:
	app_server/apps/graph/test_data/data.py
	app_server/apps/graph/tests.py
removed flags
basic functional agfk app
Merge branch 'content_schema' of https://github.com/metacademy/metacademy-application into content_schema

Conflicts:
	app_server/apps/graph/api.py
removed flags and migrated db