Returns a context from the namespace *args* (command line arguments).

def get_context(args):
  """
  Returns a context from the namespace *args* (command line arguments).

  """
  context = {}
  if args.revision:
    context['version'] = args.revision
  if args.datestamp:
    context['timestamp'] = "{:%Y-%m-%d}".format(datetime.utcnow())
  if args.timestamp:
    context['timestamp'] = "{:%Y-%m-%d %H:%M}".format(datetime.utcnow())
  if args.template:
    context['template'] = args.template.read()
  if args.css:
    context['css'] = args.css.read()
  if args.js:
    context['js'] = args.js.read()
  return context