Edited conf.py in Sphinx documentation:
  call it Dyna rather than Dyna2
  changed primary_domain to dy:
  added some commented-out stuff that may be useful in future
changed layout to match sphinx's own documentation, as suggested by sampledoc
Merge branch 'master' of https://github.com/nwf/dyna
Filled in spec outline in Sphinx documentation.
Other small changes to documentation organization, configuration, comments, emacs -*- settings,