missing_nlag_verr

This is simple correction of a coding error by inserting a missing number of good phase lags, nphi, in the expression for velocity variance.
missing_nlag_w_err

The same issue as with missing nlag_verr but for spectral width errors (for more detail see https://homepage.usask.ca/~pbp672/Data_Analysis_WG_Task1_DOF_error.pdf)
Merge pull request #2 from pasha-ponomarenko/patch-1

missing_nlag_verr