Not sure what the changes to nc2fn.py and ncconcat.py were ...
 - may have been including ts=ts in all calls to qcutils.GetDateIndex
Changes to access2nc.py:
 - data for all grid cells in the 3x3 matrix now written to netCDF file
 - suffix added to variable name eg Ta_00, Ta_01, Ta_02, Ta_10 etc
 - up to the user to choose best one, no variable "Ta" output
Changes to compare_access.py:
 - many
 - script now doe most of what was wanted in comparing ACCESS
   and tower data