Moved custom imageLoader & requestQueue out of MediaBrowserActivity so it could be reused by other classes
Rewrote MediaImageLoader
MediaImageLoader no longer extends ImageLoader
Merge branch 'develop' of https://github.com/wordpress-mobile/WordPress-Android into issue/1085-npe-media-library
Merge branch 'develop' of https://github.com/wordpress-mobile/WordPress-Android into issue/1085-npe-media-library
Merge pull request #1086 from wordpress-mobile/issue/1085-npe-media-library

Issue/1085 npe media library