Added block to the trunk version to prevent public usage. Do NOT use the trunk version of myCRED!

git-svn-id: https://plugins.svn.wordpress.org/mycred/trunk@999366 b8457f37-d9ea-0310-8a92-e5e31aec5664
Removed un-used variable.

git-svn-id: https://plugins.svn.wordpress.org/mycred/trunk@999367 b8457f37-d9ea-0310-8a92-e5e31aec5664