Remove AppKit imports from Foundation.
Remove AppKit imports from Foundation.

Bugs filed to deal with associated technologies: #1051 and #1052

Reviewed by me.

krodelin/cappuccino,rgv151/cappuccino,daboe01/cappuccino,tancred/cappuccino,tolmasky/cappuccino,dgvivero/CappCoreData,FrankReh/cappuccino,cappuccino/cappuccino,enquora/cappuccino,280north/cappuccino,kidaa/cappuccino,mrcarlberg/cappuccino,cappuccino/cappuccino,tancred/cappuccino,mrcarlberg/cappuccino,krodelin/cappuccino,cappuccino/cappuccino,enquora/cappuccino,eventualbuddha/cappuccino,AlexanderMazaletskiy/cappuccino,zittix/cappuccino,AlexanderMazaletskiy/cappuccino,cacaodev/cappuccino,mrcarlberg/cappuccino,krodelin/cappuccino,AlexanderMazaletskiy/cappuccino,daboe01/cappuccino,primalmotion/cappuccino,deltaprojects/cappuccino,koamac/Cappuccino,daboe01/cappuccino,FrankReh/cappuccino,kidaa/cappuccino,deltaprojects/cappuccino,AlexanderMazaletskiy/cappuccino,krodelin/cappuccino,wangshijin/cappuccino,rgv151/cappuccino,tancred/cappuccino,cacaodev/cappuccino,eventualbuddha/cappuccino,daboe01/cappuccino,rgv151/cappuccino,mrcarlberg/cappuccino,FrankReh/cappuccino,daboe01/cappuccino,280north/cappuccino,deltaprojects/cappuccino,krodelin/cappuccino,krodelin/cappuccino,cacaodev/cappuccino,FrankReh/cappuccino,cappuccino/cappuccino,wangshijin/cappuccino,zittix/cappuccino,mrcarlberg/cappuccino,cappuccino/cappuccino,280north/cappuccino,tancred/cappuccino,kidaa/cappuccino,deltaprojects/cappuccino,cacaodev/cappuccino,FrankReh/cappuccino,tolmasky/cappuccino,Dogild/cappuccino,rgv151/cappuccino,Dogild/cappuccino,zittix/cappuccino,tolmasky/cappuccino,primalmotion/cappuccino,AlexanderMazaletskiy/cappuccino,tolmasky/cappuccino,koamac/Cappuccino,enquora/cappuccino,FrankReh/cappuccino,FrankReh/cappuccino,Rosch/cappuccino,enquora/cappuccino,Rosch/cappuccino,mrcarlberg/cappuccino,Dogild/cappuccino,koamac/Cappuccino,primalmotion/cappuccino,mrcarlberg/cappuccino,dgvivero/CappCoreData,mrcarlberg/cappuccino,daboe01/cappuccino,tancred/cappuccino,rgv151/cappuccino,Dogild/cappuccino,Dogild/cappuccino,tancred/cappuccino,primalmotion/cappuccino,kidaa/cappuccino,Dogild/cappuccino,kidaa/cappuccino,cappuccino/cappuccino,eventualbuddha/cappuccino,zittix/cappuccino,Rosch/cappuccino,Rosch/cappuccino,enquora/cappuccino,AlexanderMazaletskiy/cappuccino,cacaodev/cappuccino,tolmasky/cappuccino,cacaodev/cappuccino,enquora/cappuccino,rgv151/cappuccino,Rosch/cappuccino,dgvivero/CappCoreData,wangshijin/cappuccino,zittix/cappuccino,deltaprojects/cappuccino,daboe01/cappuccino,Dogild/cappuccino,wangshijin/cappuccino,rgv151/cappuccino,280north/cappuccino,enquora/cappuccino,dgvivero/CappCoreData,koamac/Cappuccino,cappuccino/cappuccino,kidaa/cappuccino,primalmotion/cappuccino,wangshijin/cappuccino,cacaodev/cappuccino,Rosch/cappuccino,dgvivero/CappCoreData,FrankReh/cappuccino,Rosch/cappuccino,koamac/Cappuccino,eventualbuddha/cappuccino,krodelin/cappuccino,zittix/cappuccino,primalmotion/cappuccino,primalmotion/cappuccino,deltaprojects/cappuccino,wangshijin/cappuccino,zittix/cappuccino,280north/cappuccino,koamac/Cappuccino,deltaprojects/cappuccino