removed wp-optimize.po .. not necessary

git-svn-id: https://plugins.svn.wordpress.org/wp-optimize/trunk@903849 b8457f37-d9ea-0310-8a92-e5e31aec5664
added compatibility with git-plugin-updates and also github-updater

git-svn-id: https://plugins.svn.wordpress.org/wp-optimize/trunk@903850 b8457f37-d9ea-0310-8a92-e5e31aec5664