1.2.2 update

git-svn-id: https://plugins.svn.wordpress.org/front-end-theme-preview/trunk@863045 b8457f37-d9ea-0310-8a92-e5e31aec5664
Readme.txt changelog & wp version compartiblity

git-svn-id: https://plugins.svn.wordpress.org/front-end-theme-preview/trunk@863049 b8457f37-d9ea-0310-8a92-e5e31aec5664