Fixed: constructor of CPDate can take string param
Fixed: constructor of CPDate can take string param

Previously, when making a CPDate with some constructors, we could pass a string or nil to create a date. For example it was allowed to do var date = [CPDate dateWithTimeIntervalSince1970:"10"];

Now this is not possible anymore and it works like in Cocoa, only number are authorized.

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