Adding code to handle apiKey auto-finding =)
Making the loading of auth stuff, secret keys, and applications much simpler.

By default we'll now look for the user-specified settings -- and if those aren't
present we'll go ahead and try to find them in other ways, eg:

- apiKey.properties in the same folder.
- ~/.stormpath/apiKey.properties
- applications can be found automatically if the user has previously created one
- secret keys will be generated on the fly if not specified