Fix the 'clear' endpoint for tenant administrators that want to revert a skin value.
allow setting default values
Revert "allow setting default values"

This reverts commit 5564411649e111b1604c8dc831e89aef863c671b.
explicitly check for manual reversion to default values
remove debug statement
removed use of class to track reversions
Merge branch 'master' of https://github.com/sakaiproject/3akai-ux into skinClear
Merge remote-tracking branch 'stephen/skinClear' into skinClear
corrected handling of non-default values
Merge branch 'master' of https://github.com/sakaiproject/3akai-ux into skinClear
Merge remote-tracking branch 'stephen/skinClear' into skinClear
Merge branch 'skinClear' of https://github.com/bp323/3akai-ux into skinClear
Follow up on skin clearing
Fixed length checking problem