Add stub nib for PopulationView and fix Apto framework linking in the Avida-OSX target.
Work on drafting the Population View NIB.  Start filling out ACMapView and add a stub of ACScaleView in AvidaCore.
Implement pasteboard support for project items. Fix segragation of core and osx layers in AvidaCore framework.  Attach the map view to the population view controller and set its alignment within the scroll view.
Fix header visibility in AvidaCore-ObjC.
Fix extension on PopulationViewController and another header file visibility setting.