Clean up unneeded code

`pcv?` is already defined from the Roles list. Also, validate inclusion
in the Roles list directly, in case we change it in the future.
Merge pull request #238 from rgpass/master

Changed the layout to one column and Added margins to forms
Remove unused javascript

The date(range)pickers aren't being used, so this removes the supporting
javascript libraries and gems.
Activate jQuery placeholder
Revert validation removal #214
Fixed known BS3 issues