Added support for Command/Meta key
Fixed GNU inline assembly for Clang
Fixed whole program (link-time) optimization build with Clang
Added work-around for vectorization issue in Apple's GCC 4.x
Added HID Utilities source code

https://developer.apple.com/library/mac/samplecode/HID_Utilities/Introduction/Intro.html
https://developer.apple.com/library/mac/samplecode/HID_Utilities/HID_Utilities.zip
Added notification dialog in case of fatal error
Moved cursor and timer implementations into separate files
Added native Cocoa back-end implementation
Added support for Cocoa back-end in CMake build system
Added support for VSync option in Cocoa back-end
Added support for clipboard operations on OS X
Renamed SDL specific source file with GUI related code
Enhanced Cocoa version of IWAD picker window

Added ability to specify custom command line parameters
Added ability to browse for user files
Improved handling of restart console command
Improved layout for window
Merge branch 'master' of https://github.com/rheit/zdoom into z_osx_clean
Distinguish SDL and Cocoa back-ends in startup log
Added two SDL functions needed for GZDoom
Extracted fullscreen and windowed modes handling to separate methods
Moved render buffer options definition to own header file

This is needed for GZDoom
Set more descriptive name for SDL source files list in CMake file
Merge branch 'master' of https://github.com/rheit/zdoom into z_osx_clean