edx/edx-ora2 — pull request #449 by wedaly (2014-06-23 10:36:45+00:00)
Title: AI perf: skip grading/training if workflow is already complete

Add API calls for checking workflow completeness
Skip grading/training tasks if the workflow is already complete.

[TIM-655](https://edx-wiki.atlassian.net/browse/TIM-655)

@stephensanchez Please review.