Cleaned up TextInputExample

https://github.com/kyoken74/gwt-angular/issues/44
Added placeholder for src/test/java so GIT won't remove them.
OnClickEvent example was updated.

https://github.com/kyoken74/gwt-angular/issues/44
Updated ReverseFilterExample.

https://github.com/kyoken74/gwt-angular/issues/44
Updated UrlHashParameterExample

https://github.com/kyoken74/gwt-angular/issues/44
PrettifyExample updated

https://github.com/kyoken74/gwt-angular/issues/44