[gatein-dev] GateIn-Portal Build improvements

I've done some changes on gatein-portal build that fall into the category of ergonomics. A description of the changes is here: https://issues.jboss.org/browse/GTNPORTAL-2438 There is an updated https://github.com/gatein/gatein-portal/blob/master/README.txt To simplify / clean up things there is no support for the old equivalents of the system properties. Since there is one-to-one mapping, switching should be trivial. - marko