Added guard. Removed fixtures
Made Image Model to handle image intake.
Added ImageController under API.
Added routing for api/vi/images
Added factory for images
Added collection dropping before tests run.

Apparently test data is persistent in a mongoDB database. This needs to be dropped manually for a test to run correctly.
Changed test_helper to clear data after each test.
With setup {}
Added all appropriate Image Controller tests.

Test JSON API for all actions, create, delete, show, and index.