Add the choice of intersecting a zone with older ones or not when adding a zone.
Merge branch 'dev' of https://github.com/Mendroyxx/FeatureApp.git into urbapp_last

Conflicts:
	Code/src/com/ecn/urbapp/fragments/ZoneFragment.java
Fix the bug that displayed incorrect intersections in pierced Polygon.
Merge branch 'debugIntersectHole' into urbapp_last

Conflicts:
	Code/src/com/ecn/urbapp/fragments/ZoneFragment.java
Merge pull request #87 from jparty/urbapp_last

Add the choice of intersecting a zone with older ones or not...