Finishing up the new slideshow.  #1331

Added descriptions for link and description.

Cleaned up form.
- No more sticky or url alias
- Published was removed from the vtab
- Title is hidden and automatically generated.  Defaults to headline, but if that's not provided uses image file name.
Merge branch 'SCHOLAR-3.x' of github.com:openscholar/openscholar into SCHOLAR-3.x