Changed old reference to Widget to IsWidget
Further improvements using IsWidget to simplify the logic
Merge branch 'master' into cg_iswidget

Conflicts:
	gwtp-core/gwtp-mvp-client/src/main/java/com/gwtplatform/mvp/client/ViewImpl.java
Removed unneeded @author tags
Merge pull request #178 from ArcBees/cg_iswidget

Changed old reference to Widget to IsWidget