Fixed: CPArray did not allow binding to @count.
Fixed: CPArray did not allow binding to @count.

Previously, CPArray did not allow binding to the collection operator @count. In Cocoa this is allowed.

This commit allow the key path @count to be observed, so that @count can be bound to.

Formatting fixes as well.

krodelin/cappuccino,AlexanderMazaletskiy/cappuccino,Rosch/cappuccino,wangshijin/cappuccino,zittix/cappuccino,cappuccino/cappuccino,kidaa/cappuccino,FrankReh/cappuccino,Rosch/cappuccino,daboe01/cappuccino,Dogild/cappuccino,cappuccino/cappuccino,wangshijin/cappuccino,AlexanderMazaletskiy/cappuccino,primalmotion/cappuccino,zittix/cappuccino,enquora/cappuccino,enquora/cappuccino,mrcarlberg/cappuccino,FrankReh/cappuccino,Dogild/cappuccino,zittix/cappuccino,krodelin/cappuccino,rgv151/cappuccino,cappuccino/cappuccino,koamac/Cappuccino,FrankReh/cappuccino,koamac/Cappuccino,cacaodev/cappuccino,deltaprojects/cappuccino,cacaodev/cappuccino,mrcarlberg/cappuccino,wangshijin/cappuccino,primalmotion/cappuccino,kidaa/cappuccino,mrcarlberg/cappuccino,mrcarlberg/cappuccino,cappuccino/cappuccino,Dogild/cappuccino,wangshijin/cappuccino,deltaprojects/cappuccino,deltaprojects/cappuccino,AlexanderMazaletskiy/cappuccino,enquora/cappuccino,cacaodev/cappuccino,cappuccino/cappuccino,tancred/cappuccino,daboe01/cappuccino,krodelin/cappuccino,primalmotion/cappuccino,enquora/cappuccino,rgv151/cappuccino,zittix/cappuccino,mrcarlberg/cappuccino,cappuccino/cappuccino,rgv151/cappuccino,enquora/cappuccino,wangshijin/cappuccino,mrcarlberg/cappuccino,primalmotion/cappuccino,daboe01/cappuccino,AlexanderMazaletskiy/cappuccino,primalmotion/cappuccino,rgv151/cappuccino,rgv151/cappuccino,deltaprojects/cappuccino,koamac/Cappuccino,mrcarlberg/cappuccino,primalmotion/cappuccino,tancred/cappuccino,koamac/Cappuccino,Dogild/cappuccino,tancred/cappuccino,Dogild/cappuccino,koamac/Cappuccino,daboe01/cappuccino,Dogild/cappuccino,FrankReh/cappuccino,tancred/cappuccino,cappuccino/cappuccino,Dogild/cappuccino,daboe01/cappuccino,rgv151/cappuccino,Rosch/cappuccino,kidaa/cappuccino,zittix/cappuccino,daboe01/cappuccino,cacaodev/cappuccino,krodelin/cappuccino,tancred/cappuccino,FrankReh/cappuccino,zittix/cappuccino,Rosch/cappuccino,FrankReh/cappuccino,mrcarlberg/cappuccino,cacaodev/cappuccino,kidaa/cappuccino,deltaprojects/cappuccino,tancred/cappuccino,krodelin/cappuccino,Rosch/cappuccino,wangshijin/cappuccino,FrankReh/cappuccino,krodelin/cappuccino,rgv151/cappuccino,deltaprojects/cappuccino,kidaa/cappuccino,primalmotion/cappuccino,enquora/cappuccino,AlexanderMazaletskiy/cappuccino,zittix/cappuccino,FrankReh/cappuccino,deltaprojects/cappuccino,Rosch/cappuccino,AlexanderMazaletskiy/cappuccino,koamac/Cappuccino,kidaa/cappuccino,krodelin/cappuccino,daboe01/cappuccino,enquora/cappuccino,Rosch/cappuccino,cacaodev/cappuccino,cacaodev/cappuccino