Use the new spinner instead of loading.gif (now removed)
Renamed sublime_X columns in Video to just X
Forgot to provision wide-X in teacher layout

wide-X is where previews are rendered. Its a fixed place and must be present
for preview to work
Deleted all old models added in Aug'2013 for individual offering ...

Will now go ahead with a reduced set of models
Initial scaffolding code for supporting course creation bt indie teachers