VID-1939 adding captions and css transitions on hover state
VID-1939 refining caption interactions
VID-1939 style adjustments
VID-1939 updating comments
VID-1939 removing unsed code
Merge branch 'VID-1854-gallery' into VID-1939
Merging VID-1854-gallery into VID-1939
Merging VID-1854-gallery into VID-1939
VID-1939 changing gallery caption interaction
VID-1939 and VID-1912 adjusting tracking for new media galleries
merging VID-1854-gallery into VID-1939
VID-1939 tweaks to captions code
Merge branch 'VID-1939' into VID-1854-gallery

Conflicts:
	extensions/wikia/MediaGallery/scripts/controllers/index.js
	extensions/wikia/MediaGallery/scripts/views/toggler.js
	extensions/wikia/MediaGallery/styles/MediaGallery.scss
	extensions/wikia/Thumbnails/ThumbnailController.class.php
	extensions/wikia/Thumbnails/ThumbnailHelper.class.php