Creation of an "Args" object

[jwoertink]

Following #23

We had some discussions about the method names that get generated on to the task. What if we moved all of these methods in to a new "Args" object. So instead of calling name from --name you'd call args.name. Habitat pretty much works this same way with settings. You would have my_thing.settings.name, or whatever the setting is.

This would also have the added benefit of being able to override the names for your own custom methods, or possibly add additional validation type functions.