Add regex config to do regex matching on pet names so word filters can be created.

Add the ability to regex match names so that filters can be made to prevent profanities or admin/staff impersonation.
[java.lang.String#matches(java.lang.String)](http://docs.oracle.com/javase/6/docs/api/java/lang/String.html#matches(java.lang.String)) -> `nameToCheck.matches(key)`