Analog buttons not simulated correctly

[Nine-H]

The PS2 has analog input on all buttons except start and select encoding an 8-bit value for each input. 0 meaning not depressed and 255 representing crippling depression.

Play! always returns 255 even when the button isn't pressed, we should be able to map an axis to a button and have the press event be extrapolated from the axis moving and and when using the keyboard the pressure should only read 255 when the key is pressed (I don't know if we'd actually need interpolated roll on). This will be necessary when GT4 actually makes it ingame.