add subroutine for point input/output in netCDF

[edwardhartnett]

Pull Request Summary

add subroutine for point input/output in netCDF

Description

This PR adds the netCDF code to read/write point output, plus some testing.

Issue(s) addressed

#682

Commit Message

add subroutine for point input/output in netCDF

Check list

• [x ] Branch is up to date with the authoritative repository (NOAA-EMC) develop branch.
• [ x] Checked the checklist for a developer submitting to develop.
• [x ] If a version number update is required, checked the updating version number checklist.
• If a new feature was added, a regression test for testing the new feature is added.

Testing

Tested in unit testing.

[edwardhartnett]

@MatthewMasarik-NOAA we were talking about a regtest for these changes, was it determined that there should be one?

[MatthewMasarik-NOAA]

Hi @edwardhartnett, since it's a new feature, we should have a regtest. In this case we can basically piggy-back and existing regtest setup, and make an extra run_test call that will exercise the new option of netcdf output. I can help with that. Possibly we can tag-up offline?

[edwardhartnett]

I will move this PR to my branch while we work out namelist and regtest issues.