Updated local webfonts.json file list with the latest google fonts

git-svn-id: https://plugins.svn.wordpress.org/easy-google-fonts/trunk@991741 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated class-egf-font-utilities.php to delete the old transient from the database

git-svn-id: https://plugins.svn.wordpress.org/easy-google-fonts/trunk@991746 b8457f37-d9ea-0310-8a92-e5e31aec5664