Initial commit. Added the following tasks:

* **Config**. Run a bunch of configure tasks at once.
* **Cron**. Manage cron tasks.
* **Monit**. Manage the monit instance for your app.
* **Nginx**. Manage the nginx configuration for your app.
* **Puma**. Manage the puma configuration [using the upstart version of it](https://github.com/puma/puma/tree/master/tools/jungle/upstart)).
- Added a `safety-check` task to tell if an app has been deployed to a
directory (useful for creates!)
- Added a `dep` task to use github.com/cyx/dep
Evaluate procs while generating the settings for ERB
Added an rbenv rehash task