Added staging distribution on pom.xml for the preparation of Maven Deployment.
Added staging distribution on pom.xml for the preparation of Maven Deployment.

GwtMaterialDesign/gwt-material-template,GwtMaterialDesign/gwt-material-starter,GwtMaterialDesign/gwt-material-starter,GwtMaterialDesign/gwt-material-starter,GwtMaterialDesign/gwt-material-template,GwtMaterialDesign/gwt-material-template