reorganize force feedback code and add rumble

Additionally sets in-game FF options to use the same defaults as the old
osreg calls and makes changes take immediate effect (no restart required).
FF strength slider changed from float to integer type.

Author: notimaginative

code/io/joy-sdl.cpp

@@ -225,6 +225,9 @@ void setPlayerJoystick(Joystick* stick, short cid)
 		mprintf(("  Using '%s' as Joy-%i\n", pJoystick[cid]->getName().c_str(), cid));
 		mprintf(("\n"));
 		mprintf(("  Is gamepad: %s\n", pJoystick[cid]->isGamepad() ? "YES" : "NO"));
+		if (pJoystick[cid]->isGamepad()) {
+			mprintf(("  Gamepad type: %d\n", SDL_GetGamepadType(pJoystick[cid]->getGamepad())));
+		}
 		mprintf(("  Number of axes: %d\n", pJoystick[cid]->numAxes()));
 		mprintf(("  Number of buttons: %d\n", pJoystick[cid]->numButtons()));
 		mprintf(("  Number of hats: %d\n", pJoystick[cid]->numHats()));