Added property boundingMapRect as in iOS.
Updated classes which are conform to MKOverlay protocol.
Introduced UnitTest envrironment.
Updated test case for MKPolygon.
Corrected conversion between coordinate and map point.
Added test case for MkPRotokoll
Added UnitTests for Circle and Polyline.
BoundingRect is now calculated to MKPolyline.
Merge branch 'feature/MKOverlay.boundingMapRect' into develop
Added function MKCoordinateRegionForMapRect.
Added visibleMapRect property.
Disable animation support for visibleRectangle, since setRegion does not support it.
Merge schneim's changes and fixed some build issues