function addded to get all the videos whose thumbnails are not generated
Merge branch 'master' of https://github.com/rtCamp/rtMedia
added ajax handler for bulk vedio thumbnails regenerate
single ajax handler for both bulk and single video thumbs
single ajax handler for both bulk and single video thumbs
Merge pull request #410 from Ritesh-patel/master

 ajax handler for bulk vedio thumbnails regenerate