Modified options page to have two tabs, plus added a warning when using the plugin without MP6 or WP 3.8.

git-svn-id: https://plugins.svn.wordpress.org/admin-classic-borders/trunk@818570 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updating primary file and readme to prep for next release tag (1.2).

git-svn-id: https://plugins.svn.wordpress.org/admin-classic-borders/trunk@818572 b8457f37-d9ea-0310-8a92-e5e31aec5664