add aggregate jxr

git-svn-id: https://svn.apache.org/repos/asf/maven/jxr/trunk@1438733 13f79535-47bb-0310-9956-ffa450edef68
fix more links

git-svn-id: https://svn.apache.org/repos/asf/maven/jxr/trunk@1438735 13f79535-47bb-0310-9956-ffa450edef68