michelle: add index.php

git-svn-id: https://plugins.svn.wordpress.org/body-mass-widget/trunk@995469 b8457f37-d9ea-0310-8a92-e5e31aec5664
michelle: add gpl-3.0.txt

git-svn-id: https://plugins.svn.wordpress.org/body-mass-widget/trunk@995472 b8457f37-d9ea-0310-8a92-e5e31aec5664
michelle: add body-mass-widget.php

git-svn-id: https://plugins.svn.wordpress.org/body-mass-widget/trunk@995474 b8457f37-d9ea-0310-8a92-e5e31aec5664