Arduino library for the built-in timer2 hardware.

Used for autoupdating SNES controller state
Added reset of buttons on start so they default to nonpressed.
Changed keypressed() logic to better fit the autoupdater in GameOfLightSim

Feel free to change back to a switch-case if you desire. That change was unintended.
Removed earlier experiment. Added MsTimer2 support.
Changed controller receive logic to use the MsTimer2 library and autoupdate itself in a similar manner to the actual HW.
Slight change to account for controllers autoupdating themselves.