Changelog
---------
+r19 (2013-03-17)
++ libretro: added region, multidisk support
+* more work on cdrom code
+* changed sound sync code
+* fixed masking bugs in NEON GPU (in collaboration with Exophase)
+* fixed some compatibility issues
+* various other tweaks and fixes
+
r18 (2013-01-06)
* cdrom code greatly cleaned up
+ new GLES output mode for ARM Linux/R-Pi