blog promotion option added (pro users)

git-svn-id: https://plugins.svn.wordpress.org/youtube-embed-plus/trunk@786804 b8457f37-d9ea-0310-8a92-e5e31aec5664
Embed URLs now work inside sidebar text widgets

git-svn-id: https://plugins.svn.wordpress.org/youtube-embed-plus/trunk@789061 b8457f37-d9ea-0310-8a92-e5e31aec5664
fixed aspect ratio to compensate for control bar

git-svn-id: https://plugins.svn.wordpress.org/youtube-embed-plus/trunk@789642 b8457f37-d9ea-0310-8a92-e5e31aec5664