Note compatibility up to WordPress 3.7 RC 1.

git-svn-id: https://plugins.svn.wordpress.org/easyrotator-for-wordpress/trunk@791314 b8457f37-d9ea-0310-8a92-e5e31aec5664
Note compatibility with official 3.7 release.

git-svn-id: https://plugins.svn.wordpress.org/easyrotator-for-wordpress/trunk@794851 b8457f37-d9ea-0310-8a92-e5e31aec5664