Adding django default log handlers into logging configuration
Fixing calculator hint to display correct definition of the constant T
Updating release tag for July 14th, 2014
Refactor split migrator
LMS-2936

Also, a bunch of ancillary cleanups.

Conflicts:
	common/lib/xmodule/xmodule/modulestore/tests/test_publish.py

Conflicts:
	cms/djangoapps/contentstore/management/commands/migrate_to_split.py
	cms/djangoapps/contentstore/management/commands/tests/test_rollback_split_course.py
	common/lib/xmodule/xmodule/modulestore/__init__.py
	common/lib/xmodule/xmodule/modulestore/mixed.py
	common/lib/xmodule/xmodule/modulestore/mongo/draft.py
	common/lib/xmodule/xmodule/modulestore/split_migrator.py
	common/lib/xmodule/xmodule/modulestore/split_mongo/split.py
	common/lib/xmodule/xmodule/modulestore/tests/test_split_migrator.py
	common/lib/xmodule/xmodule/modulestore/tests/test_split_w_old_mongo.py
Merge pull request #4405 from pdpinch/fix-calc-definition-of-T

Fixing calculator hint to display correct definition of the constant T
Revising policy key names to match new UI
Merge pull request #4401 from edx/ahodges/dosumentation/DOC719

Ahodges/dosumentation/doc719
Merge pull request #4407 from edx/ora2/release-2014-07-14T13.17

Updating release tag for July 14th, 2014
Merge pull request #4397 from edx/split-migrator/lms-2936-ok

Refactor split migrator
Merge pull request #3836 from mitocw/cg/add_default_logging

Adding django default log handlers into logging configuration
Implement close_connections and drop_database on modulestores.