comprehensive objective-c built-ins list: constants, classes, protocols, etc.

The existing list of built-ins was very small - only 84 built-ins. Some notable omissions were `NSTextView` and `NSMakeRect`.

This new list contains 5732 built-ins. I tried to put together as complete of a list as I could, in part by using `objc_getClassList` to get a list of class names on both iOS and OS X.