Description of the desired feature

As noted in #587: with the more advanced time function capability, it makes more sense to use the time series fitting residual (timeseriesResidual.h5 file) from timeseries2velocity.py rather than the current dem_error.py, if the more advance (not by default) time functions is turned ON. For this, we could simply add a new option in ts2vel.py to generate/update the TS residual file.

For the script, the updated TS residual file from ts2vel.py should be equivalent to an updated TS residual file from dem_error.py, thus, it should be automatically used during re-run for noise evaluation purpose.