This indeed is a leftover documentation. Please keep in mind that I've just moved code over, haven't written any documentation.

Basically, `Config::Environment` has pulled out all the paths/env stuff from config.rb.
`Config::Manager` will be responsible for config flags like `silent`, `verbose`, `clean`,... 

He's responsible for managing the `config.yaml` file, so when you set a new config value, it writes it down to the file.
This enables us to decouple config flags from `pod config` command, and to support writing any config flag via command line (not just local repos).