Merge pull request #32 from libretro/master

Latest libretro updates
More xBR options and code cleanup (unix)
Modified defaults to alleviate sound desync/latency (win32)
NTSC filter background colour fix - blargg
APU glitches fixed
Soft patching on by default (unix)
Merge remote-tracking branch 'libretro/master'
Revert "APU glitches fixed"

This reverts commit 5be07e21e208ae9f98f27f3e0a3adff3c61e31e5.
Renamed files and functions (unix)
Serious refactoring of the UI code (unix)
Changed sprintf to snprintf (unix)
Added generic print_message() function for future use (unix)
Improved error messages (unix)
Support oversize mapper 180
Merge pull request #42 from rnjacobs/master

Oversize mapper 180
Merge branch 'master' of https://github.com/rdanbrook/nestopia
Merge remote-tracking branch 'libretro/master'
L/R now insert coins on Vs. System games (libretro)