additional Unicode win api calls, +SwapBuffers, +ChoosePixelFormat, Pixel format descriptor enum
added missing PFD_ flags, enum type to int
Add W functions
Merge pull request #704 from 9rnsr/fix_windows

Add W functions
Merge pull request #695 from foobit/master

additional Unicode win api, +SwapBuffers, +ChoosePixelFormat
MSG in DispatchMessage is a const input parameter
Merge pull request #705 from MartinNowak/constDispatchMsg

MSG in DispatchMessage is a const input parameter