Fix printout of invalid pixel hit: padding and filling with 0.
Add functionality to check the readout order of pixels. Can be switched off using the
FLAG_NOT_DISCARD_OUTOFORDER_PIXELS flag. This function checks if the order of the pixels
follows the readout token path inside every ROC. This means, the token is passed from double
column to double column, starting with 0. Inside every double column the token goes up on the
lower side (even columns) and comes down on the right side (odd columns). Using this one can
cross-check if a pixel hit is just randomly placed somewhere by a bit error or if the readout
order is valid.