Use the new tiles-master-6 – http://thread.gmane.org/gmane.comp.apache.tiles.devel/595
upgrade to svnpubsub system using maven-scm-publish-plugin.
update the release and building pages for devs (svnpubsub, and referencing existing apache docs).
Update release documentation: build requires Java7, and build requires maven-3.0.5+


git-svn-id: https://svn.apache.org/repos/asf/tiles/autotag/trunk@1538336 13f79535-47bb-0310-9956-ffa450edef68