adding note about submodule and how to get it setup
adding note about submodule and how to get it setup

mozilla-appmaker/appmaker,mozilla-appmaker/appmaker,pcoughlin/appmaker,lexoyo/appmaker,ekospinach/appmaker,secretrobotron/appmaker,caolan/appmaker,sheafferusa/appmaker,vaginessa/appmaker,valmzetvn/appmaker,nirdeshdwa/appmaker,uche40/appmaker,mozilla-appmaker/appmaker,ekospinach/appmaker,valmzetvn/appmaker,vaginessa/appmaker,nirdeshdwa/appmaker,valmzetvn/appmaker,pcoughlin/appmaker,uche40/appmaker,secretrobotron/appmaker,ekospinach/appmaker,sheafferusa/appmaker,lexoyo/appmaker,lexoyo/appmaker,nirdeshdwa/appmaker,vaginessa/appmaker,sheafferusa/appmaker,uche40/appmaker,pcoughlin/appmaker