Added branch detection and updates documents

git-svn-id: https://plugins.svn.wordpress.org/genesis-stage-switcher/trunk@861959 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updates documents

git-svn-id: https://plugins.svn.wordpress.org/genesis-stage-switcher/trunk@861960 b8457f37-d9ea-0310-8a92-e5e31aec5664