Drop 10.6 and 32 bit support
fix warnings
Disable Apple's auto resume feature. Fixes #1152

As per the [docs](http://developer.apple.com/library/mac/#documentation/General/Conceptual/MOSXAppProgrammingGuide/CommonAppBehaviors/CommonAppBehaviors.html#//apple_ref/doc/uid/TP40010543-CH7-SW3)
Update xib versions

Deployment: 10.7 Development: Xcode 4.5