README.md cleanup

git-svn-id: http://sunny.svnrepository.com/svn/sunny-side-up-general/sharethis/branches/3.0@5561 7b40dde9-fc51-43d4-b609-63a66f0a0cee
README.md cleanup

git-svn-id: http://sunny.svnrepository.com/svn/sunny-side-up-general/sharethis/branches/3.0@5562 7b40dde9-fc51-43d4-b609-63a66f0a0cee