adding simple deployment script which will setup and clean up iptables rules while the container is running.
Enable disk cache and parameterize MAX_OBJECT_SIZE and DISK_CACHE_SIZE via environment variables.

Move the deploy.py script inside the docker instance and automatically setup and teardown IPTABLES rules from inside the instance.

Document the updates as well as how to run with a persistent cache.
first pass response to review of pull-request and isolating squid from permissions.
Merge pull request #2 from tfoote/deploy_script

Add a python script to build, run and setup and tear down ip tables rules