Pearson export/import code. (No merging before 25th Jan)

min height on droppable areas and add padding to top/bottom on hover.

unit/subsection/section drag and drop on overview page

Added one more year!

racing condition.

put back the 'position' argument to get_module() which got accidentially...

put back the 'position' argument to get_module() which got accidentially - or so I think - dropped in a previous commit

Fix broken IE due to using the word function

Merge branch 'feature/apenney/pearson-merge' of github.com:MITx/mitx into feature/apenney/pearson-merge

fix merge problem. assign_default_role() ended up being defined twice as...

fix merge problem. assign_default_role() ended up being defined twice as that code was added in both master and cms-master branches, but the merge didn't pick it up as a conflict

Merge branch 'feature/apenney/pearson-merge' of github.com:MITx/mitx into feature/apenney/pearson-merge

Merge branch 'feature/apenney/pearson-merge' of github.com:MITx/mitx into feature/apenney/pearson-merge

add UTC time to registration end date

Run over each file and run the import.  We could probably do this as a try/except and not delete if the output of the import failed but it may be simply easier to refetch those files from the S3 backup and try again.