edx/edx-platform — pull request #4397 by dmitchell (2014-07-11 21:00:26+00:00)
Title: Refactor split migrator

LMS-2936

Also, a bunch of ancillary cleanups.
Removed a bunch of loc_mapper code
Cleaned up offering now being course and run in a few places
Removed extra db queries

Replaces https://github.com/edx/edx-platform/pull/4357