added german language, added hooks

git-svn-id: https://plugins.svn.wordpress.org/clear-cache-for-widgets/trunk@947601 b8457f37-d9ea-0310-8a92-e5e31aec5664
added german language

git-svn-id: https://plugins.svn.wordpress.org/clear-cache-for-widgets/trunk@947602 b8457f37-d9ea-0310-8a92-e5e31aec5664