django-hosts requires *.dist-info metadata

[rsalmaso]

django-hosts raise an error if no *dist-info metadata is present

pkg_resources.DistributionNotFound: The 'django-hosts' distribution was not found and is required by the application

Possible actions:

• set __version__ manually

  __version__ = '1.2.3'

• wraps call into a try/except block

  try:
  import pkg_resources
  VERSION = pkg_resources.get_distribution('django-hosts').version
  except Exception:
  VERSION = 'unknown'

• others?