split McCLIM-Coca as McCLIM-Coca/ObjC, McCLIM-Coca/Cocoa and McCLIM-Coca.
The McCLIM-Coca/Cocoa could serve as a portable Cocoa layer on ECL, SBCL, LispWorks (only tested with Personal Edition).
Not sure why ECL failed to load McCLIM-Coca. But here is example showing LispWorks with superapp on McCLIM.
So the Cocoa layer is kinda stable? I think. Next step would be enhancement on native Cocoa layer porting widgets into CLIM gadgets.
