Clarifying in the footer that GWT Angular is not affiliated with GWT.
Updated the footer disclaimer.
Renaming the com.asayama.gwt:gwt-core to com.asayama.gwt:kyoken74-gwt.

This is a first step for turning this into an independent module. This
module is starting to become stable, and before it can be made into an
independent project, we must rename it to something that cannot be
confused with one of offical GWT Project module.

https://github.com/kyoken74/gwt-angular/issues/17
Renamed com.asayama.gwt.Core module to com.asayama.gwt.JSNI and Util.

https://github.com/kyoken74/gwt-angular/issues/17