- Fix bugs in history/restart frequency associated with new calendar (CICE-Consortium#589)
- Define frequency in absolute terms relative to 0000-01-01-00000 and document (CICE-Consortium#589)
- Update set_nml.histall to include hourly output (CICE-Consortium#589)
- Update test scripts to cleanly abort if run fails where possible (CICE-Consortium#608)
- Update decomp test so it's rerunable, remove restart at start of run (CICE-Consortium#601)
- Add ability to do bfbcomp tests with additional options set on command line (CICE-Consortium#569)
- Update documentation of calendar frequency computation, calendar types, and closed boundaries (CICE-Consortium#541)
- Add optional doabort flag to abort_ice to control whether the method aborts.  This
  is useful for testing and code coverage statistics, although doabort=.false.
  will not call the actual abort method, but we can test the interfaces and
  rest of the code.

  reference data for history and restart output.  Defaults are
  'zero' and 'init' respectively for hist and dump.
  Setting histfreq_base to 'zero' allows for consistent output
  across multiple runs.  Setting dumpfreq_base to 'init' allows
  the standard testing which requires restarts be written,
  for example, 5 days after the start of the run.
- Remove extra abort calls in bcstchk and sumchk on runs that
  complete fine but don't pass checks.  These aborts should never
  have been there.
- Update documentation.

  - restart namelist is deprecated, now computed internally
  - modify initial/continue init checks and set restart and use_restart_time as needed
- create compute_relative_elapsed method in ice_calendar to improve code reuse
- update documentation with regard to initial/continue modes