Moved Log Query to includes, improved the Module Abstract class, improved Log Module

git-svn-id: https://plugins.svn.wordpress.org/mycred/trunk@768661 b8457f37-d9ea-0310-8a92-e5e31aec5664
Moved mycred_history shortcode and mycred_send shortcodes to the mycred-shortcodes.php file

git-svn-id: https://plugins.svn.wordpress.org/mycred/trunk@768662 b8457f37-d9ea-0310-8a92-e5e31aec5664
Improved third party hook handling.

git-svn-id: https://plugins.svn.wordpress.org/mycred/trunk@768663 b8457f37-d9ea-0310-8a92-e5e31aec5664