Updated to version 1.15

git-svn-id: https://plugins.svn.wordpress.org/socialradios/trunk@881723 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated credits

git-svn-id: https://plugins.svn.wordpress.org/socialradios/trunk@881726 b8457f37-d9ea-0310-8a92-e5e31aec5664