General coments and documentation

TerseHandling
-add the js classes for events
-add gwttent.jar library for reflection in js
-add empty constructor to core /Agent.java for GwtExporter

ActionDrivenCallback
- change DlVector by PVector of ProcessingJs Stub
-add gwt xml for export
-add web.xml to resolve errors

BoringClickAndDrag
- change DlVector by PVector of ProcessingJs Stub
- modify gwt xml