Light gun/pen + Arcadia device types

[sonninnos]

New device types:

• "Arcadia" for easing the burden of configuring the wacky and switched around joystick+keyboard controls, and also is set automatically if the file has _Arcadia in it, such as WHDLoad installs:
  • Fire 2 = LShift/RShift
  • Start = Start P1/P2 = F1/F2
  • X & Y = Coin P1/P2 = F3/F4
  • R3 = F5 (menu)
• Light gun & pen Closes #554