adds (at)will deploy <branch> shortcut for (at)will create stack for <branch>
changed shortcut
Allows booleans in config.
adds list stacks alias'
Merge pull request #5 from greenkahuna/feature/easier-staging

adds "(at)will stage <branch>" shortcut for "(at)will create stack for <branch>"
Teaches will how to tell us when github's down.
Teaches will how to let us know when heroku's down as well.
Adds some debug for figuring out a clever staging solve.
Upgrades to will 0.4.3.