Adding First Version of The Plugin

git-svn-id: https://plugins.svn.wordpress.org/validate-gravatar/trunk@860745 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update Readme File's Example

git-svn-id: https://plugins.svn.wordpress.org/validate-gravatar/trunk@860764 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update Readme File's Example

git-svn-id: https://plugins.svn.wordpress.org/validate-gravatar/trunk@860767 b8457f37-d9ea-0310-8a92-e5e31aec5664