Add support for button combos that are built-in to controllers:
y+x+start for three seconds updates the origin
b+x+start for three seconds resets
Changed CPeripheralInterface to a namespace and renamed to ProcessorInterface
git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@4366 8ced0084-cf51-0410-be5f-012b33b47a6e