Commit antes de merge.
Agregue los methodHandlers (estan incompletos)
Agregue la parte shared y server de AssistanceModelGwt
Merge branch 'assistance' of https://github.com/pablodanielrey/java into assistance

Conflicts:
	gwt/assistanceGWT/src/main/java/ar/com/dcsys/gwt/assistance/client/activity/justification/JustificationPersonActivity.java