Fixed Vimeo protocol-relative ebmeds and fixed a bug with PNG image types

git-svn-id: https://plugins.svn.wordpress.org/video-thumbnails/trunk@791525 b8457f37-d9ea-0310-8a92-e5e31aec5664
Reduced overhead on settings pages

git-svn-id: https://plugins.svn.wordpress.org/video-thumbnails/trunk@792459 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixed issue where the first video may not be detected when posting videos from multiple sources

git-svn-id: https://plugins.svn.wordpress.org/video-thumbnails/trunk@794208 b8457f37-d9ea-0310-8a92-e5e31aec5664