Added MKMapItem MKMultiPoint MKPolyline MKDirections(Request|Response) MKRoute MKRouteStep.
With test for directions service.
New: MKMapView convert... methods

MKMapView
- (CLLocationCoordinate2D)convertPoint:(CGPoint)point
toCoordinateFromView:(CPView)view
- (CGPoint)convertCoordinate:(CLLocationCoordinate2D)coordinate
toPointToView:(CPView)view
- (MKCoordinateRegion)convertRect:(CGRect)rect
toRegionFromView:(CPView)view
- (CGRect)convertRegion:(MKCoordinateRegion)region
toRectToView:(CPView)view

MapPoint / CLLocationCoordinate and MKCoordinateRegion / MKMapRect
conversion using native Mercator projection algorithm. It is now
possible to set visibleMapRect without waiting for the
'projection_changed' notif.