Einthusan - make sure spaces in thumb urls are escaped
Merge pull request #637 from mikedm139/einthusan

Einthusan - make sure spaces in thumb urls are escaped
VGTV - Make thumb optional
Vimeo - If the bitrate value for every version of a video is wrongly set to the same value, use the rsolution to determine the best match.
Vimeo - Check for required keys in the json feed, check for 404s.
VideoJug - Update thumb location, remove duration.
Vimeo - Check for HTTP 403 error
MSNBC - Check if we found a video id in the url.
Rutube - Check og:video element