1.45-a1

	- Added alternative model for row drifts. RowBiasDrifts can be used
        instead of RowPolynomials. The new model is based on the assumption
        that the drifts are caused by slight fluctuations in the bias voltages
        to rows. Accordingly, the gains by which these couple to pixel readout
        are different than what is assumed in the Polynomial model (which
        essentially assumes that row drifts are temperature fluctuations.).
	This model is controlled, in the usual way, by the keys ROW_DRIFT_TURN
	and ROW_DRIFT_T and the corresponding -IrowDrift= and -rowDriftT 
	options.

