normalized the name AudioMack to Audiomack

git-svn-id: https://plugins.svn.wordpress.org/audiomack/trunk@779653 b8457f37-d9ea-0310-8a92-e5e31aec5664
changed plugin url to: http://www.audiomack.com/wordpress/

git-svn-id: https://plugins.svn.wordpress.org/audiomack/trunk@779655 b8457f37-d9ea-0310-8a92-e5e31aec5664