* fedora/tg/util.py: Fix up handling of requests.   New algorithm:   first check tg_format because people are more apt to use the query param   when they want to override other things going on.  Then use Accept Header.
* fedora/tg/util.py: Fix up handling of requests.   New algorithm:
  first check tg_format because people are more apt to use the query param
  when they want to override other things going on.  Then use Accept Header.

fedora-infra/python-fedora