v1.0.2.12

add spatial program for reading/writing ascii, netCDF and HDF5
generalize LPET, LPT, OPT and tide scripts to use csv, netCDF4 or HDF5
add compute tidal current program that can use csv, netCDF4 or HDF5
use netrc within utilities for backup authentication
add utilities for parsing date strings in form "time-units since yyyy-mm-dd hh:mm:ss"