Encoder Overflow when driving backwards

[Snaw3]

When driving backwards, the encoders of the Create Roomba 600 overflow, because the wrap around handler is implemented in a way, which only works in one direction https://github.com/AutonomyLab/libcreate/blob/d75d41c63843581cfd113fd8ceac976d65bc06b4/src/create.cpp#L164