deleting docker-postgresql submodule
adding oficial postgresql docker image as the DB container
fixing the django container to use the new postgresql docker env vars
Changing the django Docker to the project root dir. since now we only have one dockerfile
using the python:2-wheezy as sugested, so now just need to install the libmemcached-dev.
Also added the requirements.txt to the docker file.
this should simplify the environment =)
removing some comments from fig.yml, basicaly I removed the local mapping for the
postgresql docker volume.