Turning the rat check on by default to help make sure that with any subsequent changes that license issues are detected.
Added licenses for missing files and have asked William about one source I found with an EPL license that looks like he wrote it so asked him to verify.


git-svn-id: https://svn.apache.org/repos/asf/maven/shared/trunk@1595639 13f79535-47bb-0310-9956-ffa450edef68