Video (vid-245, vid-246): LicensedVideoSwap - add functions to skip video, swap video. - add messages.
Video (vid-245): LicensedVideoSwap - add function to check if premium video exists.
add commit to wfSetWikiaPageProp() function
add commit to wfDeleteWikiaPageProp() function
Video (vid-245, vid-246): LicensedVideoSwap - add functions to restore skipped video.
Merge branch 'LicensedVideoSwap' into vid-245

Conflicts:
	extensions/wikia/LicensedVideoSwap/LicensedVideoSwap.i18n.php
	extensions/wikia/LicensedVideoSwap/LicensedVideoSwapSpecialController.class.php
Video: fix conflict
Merge pull request #929 from Wikia/vid-245

vid-246: Code to mark a video as skipped and undo skipped video