Cosmetics

PERTY:
```console
$ bashbrew --help

usage: bashbrew [build|push] [options] [repo[:tag] ...]
   ie: bashbrew build --all
       bashbrew push debian ubuntu:12.04

This script processes the specified Docker images using the corresponding
repository manifest files.

common options:
  --all              Build all repositories specified in library
  --docker="docker"
                     Use a custom Docker binary
  --help, -h, -?     Print this help message
  --library="/home/tianon/docker/stackbrew/library"
                     Where to find repository manifest files
  --logs="/home/tianon/docker/stackbrew/bashbrew/logs"
                     Where to store the build logs
  --namespaces="library stackbrew"
                     Space separated list of namespaces to tag images in after
                     building

build options:
  --no-build         Don't build, print what would build
  --no-clone         Don't pull/clone Git repositories
  --src="/home/tianon/docker/stackbrew/bashbrew/src"
                     Where to store cloned Git repositories (GOPATH style)

push options:
  --no-push          Don't push, print what would push

```