Added Cron schedule cleanup on plugin de-activation

git-svn-id: https://plugins.svn.wordpress.org/mycred/trunk@758610 b8457f37-d9ea-0310-8a92-e5e31aec5664
Added check for each template tag types to prevent tags not used from being loaded. Improved loading time for log.

git-svn-id: https://plugins.svn.wordpress.org/mycred/trunk@758611 b8457f37-d9ea-0310-8a92-e5e31aec5664