add -l to docker ps
changed last to n
snake_case to camelCase
fixes some usages
docker daemon: create file containing PID

Ensure the docker daemon creates a file containing its PID under
/var/run/docker.pid.

The daemon takes care of removing the pid file when it receives either
SIGTERM, SIGINT or SIGKILL.

The daemon also refuses to start when the pidfile is found. An
explanation message is shown to the user when this happens.

This change is required to make docker easier to manage by tools like
checkproc which rely on this information.
removed not needed [OPTIONS] and remove poor messages like 'Not enough arguments'
Merge pull request #395 from dotcloud/commands_usage-fix

fixes some usages (multiple parameters mostly)
Merge pull request #381 from dotcloud/371-add-l-ps

Add options to docker ps
Merge branch 'create_pidfile' of https://github.com/flavio/docker into flavio-create_pidfile
Go fmt
Update AUTHORS
Merge pull request #403 from titanous/update-authors

Update AUTHORS