Gwt 450

GWT-450: remove dependency to geomajas-face-common-gwt

old geomajas-face-common-gwt project has been split into three projects: 2 in gwt2 (geomajas-client-common-gwt and geomajas-client-common-gwt-common) and 1 in gwt (geomajas-client-common-gwt-smartgwt)

Requests includes: making changes to project geomajas-client-common-gwt-smartgwt: change parent and add gwt.xml file.