Repository clean-up and DART registration form
removed obsolete code:
- cam-old
- restart_file_tool
- html boilerplate from pre-readthedocs documentation
- null versions of clamp_mod and vert_convert_mod
- io test harnesses
- jekyll website
removed experimental code:
- pnetcdf (for restart files)
- filter.separate_seq (split obs_seq across cores)
Registration info now on the GitHub README.md