Upgrade image gallery to 2.x version
#1692: Remove clear cache from Behat tests.
Remove media query from all theme layout css files, except ballard, commodor and aberdeen.#1686
OS footer regions: cleaned up/consolidated css.#1582
Merge branch 'SCHOLAR-3.x' into 1255.
Merge branch '1255' of github.com:openscholar/openscholar into 1255.