Get `octo start` working.

[darron]

• Make sure it picks the right BUILD_ORG_NAME
• Get it starting a container with the Docker API.
• Pass a number of containers if more than 1.
• Set the proper RUN_OPTIONS
• Make sure to load all ConfigEnv variables.
• Handle special custom Dockerfile commands.
• Get ID, Port and Container IP.
• service:tags
• service:set
• Add upstart.