Add bowling metadata

Adds metadata for the bowling game kata as given here: http://butunclebob.com/ArticleS.UncleBob.TheBowlingGameKata

Example provided in PDF on source website in Java or the same solution/tests translated to PHP here: https://github.com/jrdnull/xphp/commit/6df72c25b8ce23b90bdb8d1b1555a345881715c2