This PR removes the accelerometer feature because it did not work properly. Maybe it will come back later, but currently it is just code that can confuse.
Added a new way to rotate the led matrix and mapped the positions differently (thanks @atesgoral #3).
Memory can now be disabled as it can cause problems on some boards. For example if the memory is readonly.
The change from #7 was added.
The remaining letters were made into a hex array
TODO: make rotations possible with a transformation matrix #2
TODO: make rotations possible with a transformation matrix #2