Image Gallery from ITSISU.  New Paperclip, modifications to ResourcePages, adds tests.


This work started by cherry picky commits in ITSISU which related to the image gallery featuers:

git cherry-pick 03c3228, eeb7ff3, 3e2cfcd, 3495d15, 74ae830, fbf593e, e3a341d, 647cd82, 59f70e5, 4f3236d, 7f03c7b, 0248c51, 9e39053, 640f3af, 115954b, e20aafd, 1f9bbe6, 6d7fca5, c3580c4