DCDI model:  added an User Interface option to select Linear (=1) or Logarithmic(=0) concentration conversion.

FireVoxel Build 133 is released.

DCDI model:  added an User Interface option to use the L1 or L2 metric for calculating the
fitness residual.

YL-case,   "DCDI - Stabilized V1"

Obtained a good fit with good parameter values except for the high flow. Perhaps high flow can be explained by the concentration conversion.
Note1:  ROI was drawn fairly large as in Sourbron's paper (i.e. 40-60 mm diameter)
Note2:  As in Sourbron's paper the Arterial delay exceeds the Venous delay.  Interestingly that would
mean that venous contrast arrives first, but this is exactly his primary mode.