Update 0.1.0

Here's the list of changes:
* Ensured noflo 0.5 and stripe 2.5 support.
* Moved tests from NodeUnit to Mocha.
* Added new components and specs for them: `GetCharge`, `ListCharges`, `RefundCharge`, `UpdateCharge`, `CreateCardToken`.
* Renamed ports to be more meaningful (important when using Flowhub).
* Started migrating to new NoFlo 0.5 ports API.
* Added default test key, so `STRIPE_TOKEN` is not required to run tests.
* Changed a few things here and there.