Hide news submitted by var isntead of by hook.  #1412

This updates a strongarm var.  I also introduced a new date format which is just a strongarm var so news dates could look like they used to isntead of using the default long date.  All hook update had to do was revert os_news' variable feature
Merge branch 'SCHOLAR-3.x' of github.com:openscholar/openscholar into SCHOLAR-3.x