Added in better support for Cross Domain image and video hosting. Cleaned up code formatting. Fixed 1x1 image src to use relative http(s) protocol base on parent page. Added informational text to settings page regarding Cross Domain image and video hosting.

git-svn-id: https://plugins.svn.wordpress.org/swarm-cdn/trunk@778928 b8457f37-d9ea-0310-8a92-e5e31aec5664