michelle: removing wrong readme.txt

git-svn-id: https://plugins.svn.wordpress.org/body-mass-widget/trunk@995507 b8457f37-d9ea-0310-8a92-e5e31aec5664
michelle: add new readme.txt

git-svn-id: https://plugins.svn.wordpress.org/body-mass-widget/trunk@995508 b8457f37-d9ea-0310-8a92-e5e31aec5664