XCodeProject: Update to stop whining of Xcode...
Screen/OSX: Always use Cocoa/NSOpenGL unconditionally.

No CGL for fullscreen onscreen window setup anymore.
Apple deprecated CGLSetFullScreenOnDisplay() already at OSX 10.7 and -
by introduction of horrifying new bugs into OSX 10.8, at least on
multi-display setups - made clear it doesn’t want us to use a reliable
api for fullscreen anymore.
We defer to Apples wisdom and always use Cocoa, completely giving up
control over fullscreen window setup to the os - may the lord help us.
We used this setup already in final PTB 3.0.11 if OSX version was >=
10.8, but so far not on earlier OSX versions. We don’t care about those
anymore, so this is effectively just dead code removal.
Screen/OSX: Kill CGLCopyContext

Another deprecated thing on OSX 10.9 - let it die.
Screen/OSX: Remove deprecated Gestalt(), and compile fixes.

Detect AppNap dynamically. Fixup some compile failure and dead code.
Screen/OSX: Replace deprecated CGDisplayIsCaptured()...

… and adapt some other deprecated stuff.