Added MWPhotoBrowser 1.2.1 and fixed 1.2.0
Removed social_media_url from MWPhotoBrowser podspecs.
Added MWFeedParser 1.0.0
Merge pull request #6281 from mwaterfall/master

Added MWPhotoBrowser 1.2.1 & 1.2.0 and MWFeedParser 1.0.0