Fix ApproveAssignment functionality by fixing http-enhanced and forcing the version
jQuery.ajax doesn't take a type: argument, oops
Use misc-js/Form to read form input instead of serializeArray, which was failing completely.
Show no-more-unclaimed segments warning even for previews
Update a couple static/lib sources: misc-js and jquery-tablesorter
Change old lessc to new lessc+cleancss
Add preview to HIT create page