Changes

1.0.0 December 6th, 2011
  - Add APIs and tests for Plans and "Invoice Items"
    (both changes by Ryan Ettipio)

0.0.5 November 26th, 2011
  - Add Subscription API (John Ku, #3)
  - Add Invoices API (Chris Winn, #6)
  - Fix a bug where callback could be called twice, if the callback()
    threw an error itself (Peteris Krumins)
  - Fix bug in tokens.retrieve API (Xavi)
  - Change documentation links (Stripe changed their URL structure)
  - Make tests pass again (error in callback is null instead of 0 if all is well)
  - Amount in stripe.charges.refund is optional (Branko Vukelic)
  - Various documentation fixes (Xavi)
  - Only require node 0.4.0

0.0.3 October 5, 2011
  - Add Charges API (issue #1, brackishlake)
  - Add customers.list API

0.0.2 September 28, 2011
  - Initial release with customers and tokens APIs