Create as-quickstart and as-archetype repos, and prepare them for sub-tree integration with jboss-as repos

See https://community.jboss.org/message/647192#647192 for specifics.

Additional discussions:

• My thinking on this is start with the archetypes, and the once wesley verifies the latest PR from kris we can merge it into jboss-as and then take that, to create our new structure in as-quickstarts
• Then, before we have them "pull" our new repos into jboss-as we need to complete AEROGEAR-57 to make the archetype, and quickstart be in sync
• Then we can talk about an initial tag, and work with Pete to get it merged in with sub-tree