Moved from gwt-leaflet to g-leaflet.

Just about works!  Eventhandling needs completely changing;  all
discotools references need removing.
minor import changes
Merge ..\v7-leaflet

Conflicts:
	src/main/java/org/vaadin/addon/leaflet/client/vaadin/LeafletMapConnector.java
	src/main/java/org/vaadin/addon/leaflet/client/vaadin/LeafletPolygonConnector.java
Renamed packages to make them all available to GWT