add new icon, remove old missing files

git-svn-id: https://plugins.svn.wordpress.org/wp2yt-uploader/trunk@1018464 b8457f37-d9ea-0310-8a92-e5e31aec5664
fix path to plugin files

git-svn-id: https://plugins.svn.wordpress.org/wp2yt-uploader/trunk@1018468 b8457f37-d9ea-0310-8a92-e5e31aec5664