Remove 32-bit pixel format support
Use a simplifed audio path based on work by Tobias Jakobi at https://gitorious.org/desmume-libretro
Style: Get rid of so called 'Yoda conditionals'
Style: Remove braces around single statement blocks; use < instead of != in for loops
Add screen layout core option. If changing between vertical and horizontal you need to restart retroarch to update the video info.
Make libretro.cpp namespaces unnamed
Style: Move unimportant functions out of the way
Clean up input code