Include the option for an environment flag

[htorrence]

Currently apparate considers one specified folder as a production folder, and everything else as personal/development folders. It would be nice to also support the ability to have more environments, for example a WIP or staging environment.

This would include some complexity around updating jobs, as you would also need a consistent way to identify which environment a given job belongs to in order to know which version of a library it should have attached.