Swift 3: Value Types and Naming

[michael-lehew]

Does the following:

1. brings AffineTransform value type over (changing name of previous struct)
2. de-NS's NSAffineTransform
3. apply new naming guidelines to NSAffineTransform
4. add hash tests
5. profit

[michael-lehew]

@swift-ci please test linux

[jrose-apple]

CharacterSet changes snuck in here which broke things:

Foundation/CharacterSet.swift:58:18: error: method does not override any method from its superclass
   override func copy(with zone: NSZone? = nil) -> AnyObject {
                 ^
Foundation/NSCharacterSet.swift:197:15: note: potential overridden instance method 'copy(with:)' here
    open func copy(with zone: NSZone? = nil) -> Any {
              ^
Foundation/CharacterSet.swift:62:19: error: method does not override any method from its superclass
    override func mutableCopy(with zone: NSZone? = nil) ->  AnyObject {
                  ^
Foundation/NSCharacterSet.swift:211:15: note: potential overridden instance method 'mutableCopy(with:)' here
    open func mutableCopy(with zone: NSZone? = nil) -> Any {
              ^

I'm going to revert to get the Linux bots blue again.