Feature to modify rotation axis #343

Something I would like to see regarding the accelerometer is the ability to change the rotation about an axis and have the associated acceleration values change in proportion to the amount of rotation. Rotation values of 0, 0, 0 would define an orientation of the board as if it were lying flat on a table with the buttons facing up. Or as seen on the screen with the +z axis facing the user. In this initial position the x and y drag bars would be set to zero but the z would be -9.8. This ability could be optional and turned on/off with a checkbox.

Mentioned in this issue #342 by Brian Brady (@profbrady).