GMS-4: refactor org.mypackage to org.geomajas.quickstart.mobile

NEEDS VOTE

deployed example: http://dev.geomajas.org/geomajas-gwt2-mobile-quickstart-application-GMS-4_refactorPackages/
compare with http://dev.geomajas.org/geomajas-gwt2-mobile-quickstart-application-1.0-SNAPSHOT/