Bumb version number to v3.1.0-a1
Move the mouse wheel stuff to a more appropriate place: handleMouseInput()

It was just messy and wrong being in the player tick handler.
Also, it didn't even work in the FTB Unleashed modpack anymore, some
other mod was eating all the mouse events.
Update the mcmod.info file
Fix the glitchiness with the yaw rotation when crossing a certain angle.