Add is_active field to LabProxy.
Show LabProxy.
View for lab proxy detail.
Remove '_id' from DATA for consistency.
Removed unused files.
Fix test_utils and add more tests.
Tests for LabList view.
Tests for LabDetail view.
Tests for quizblocks and problems API.
LabProxy API views tests.
CreateUserProblem API views tests.
CreateUserLabProxy API views tests.
Merge branch 'lab-xblock' into user-save

Conflicts:
	labster/admin.py
	labster/api_v2_urls.py
	labster/forms.py