Added option to disable channel message
Added [hitbox][/hitbox] shortcode (See Installation/readme.txt notes for detailed info)

git-svn-id: https://plugins.svn.wordpress.org/hitboxtv-widget/trunk@966117 b8457f37-d9ea-0310-8a92-e5e31aec5664
Readme fix

git-svn-id: https://plugins.svn.wordpress.org/hitboxtv-widget/trunk@966118 b8457f37-d9ea-0310-8a92-e5e31aec5664