[keycloak-dev] abstracting out picketlink

Don't laugh, I know I said I wasn't going to do this, but I am now. Abstracting out picketlink will make an easier transition for me to fit in the new version of Picketlink. Obviously it will also allow us to dump Picketlink too if it turns out its just not going to scale or they aren't accepting our pull requests. Hopefully we won't have to do that though. So merge from master often as I'll be committing as I go. -- Bill Burke JBoss, a division of Red Hat http://bill.burkecentral.com