TimeConstantCalculator-Mult... updated to include heatmap of tau values

The script has the results of a lot of manual data manipulation on the
tau datasets to plot out the accuracy of the tau tracking.  Tau ends up
tracking very well for any value where iin is less than 0.5
Updated TimeConstantCalc-MultTauInput to handle linear extrapolation of the data

The script was cleaned up to be more memory efficient and now also
implements extrapolating the tau value using a linear fit of the log of
the data.

The other two files included in this commit have very tiny changes, and
this just syncs them with the server.