Ensure admin api does not gzip request data

Stagecraft does not yet handle gzipped data being posted to it. It
appears django takes the view this should be handled at the nginx layer
- https://groups.google.com/forum/#!topic/django-developers/5zw5vNtpHBo

As there is no need at this stage to gzip the data, we have chosen to
disable gzipping posted data to the admin app
bump version

- fixes bug of compressed admin api requests - we cannot yet handle this
  in stagecraft