Get the status of the Toshiba FlashAir, namely its IP address.
The IP address is currently reported through an M46, but this
is subject to change and the IP address shall be shown on the display.
Implemented bed skew calibration by matching a precise physical model
to the measured data using the least squares method.
Rewrote handling of the command buffer to preserve memory
and allow pushing the commands to the front of the queue.
