We don't need a tags policy anymore

As the EC2 instance gets all its info from the S3 bucket.
Remove some unneeded files

We have stripped out the Oscar part now and all the deploy stuff now
lives in deploy/ not www/deploy/
Drop private media handling

This is better handled using S3 and a custom storage for the fields in
question.
http://tartarus.org/james/diary/2013/07/18/fun-with-django-storage-backends
Tweak supervisord conf

- Only try to start uWSGI once
- No need to specify a STDERR logfile if we're not going to use it (due
  to redirect_stderr=true)
Run cron within the Docker container
Force compression on container startup

We need this when running the container locally as offline compression
isn't enabled then.
Minor comment tweaks
Move local requirements into correct place
Ensure non-tasks start with _ in fabfile

So they don't appear when you run

    fab -l
Tweak comments in Dockerfiles
Don't use custom log files for bootstrapping

STDOUT gets collected in /var/log/cloud-init-output.log already - we
don't need custom files.
Strip aws-security-token query param from static URLs

This is due to a bug in Boto which includes this parameter even when
it's not needed. Doing so causes S3 to respond with an AccessDenied
response.
Use a date-specific filepath for the mounted envfile

To avoid two containers using the same file.
Create the logs folder before we try and write to it