edge.html inherits from main.html
LMS-1584
Removed stripped-main.html since it is not being used anymore.
LMS-1584
Merge pull request #2068 from edx/usman/lms1584-edge-home-page

Fix register button on edge
BLD-518: Fix video volume cookie.
Fix bug about draft verticals reordering.

STUD-714
Merge pull request #2135 from edx/anton/fix-video-volume-cookie

Video: Fix volume cookie.
Merge pull request #2105 from edx/christina/reorder-privates

Fix bug about draft verticals reordering.
Clean up some pre-existing formatting.
Remove unused things.
Rename DbModel to KvsFieldData.
Implement InheritanceFieldData
Use XBlock xml serialization and deserialization

XModules continue to use their own interface for xml, but provide an
adaptor that makes the the XBlock interface available.

[LMS-179]
Temporary requirements fix for testing