added support for responsive layouts

git-svn-id: https://plugins.svn.wordpress.org/youtube-embed-plus/trunk@784259 b8457f37-d9ea-0310-8a92-e5e31aec5664
fixed typo

git-svn-id: https://plugins.svn.wordpress.org/youtube-embed-plus/trunk@784299 b8457f37-d9ea-0310-8a92-e5e31aec5664
refined analytics js

git-svn-id: https://plugins.svn.wordpress.org/youtube-embed-plus/trunk@785555 b8457f37-d9ea-0310-8a92-e5e31aec5664
Improved separation of PRO and Free features in the UI

git-svn-id: https://plugins.svn.wordpress.org/youtube-embed-plus/trunk@785636 b8457f37-d9ea-0310-8a92-e5e31aec5664