Added support for account.retrieve

https://stripe.com/docs/api#retrieve_account
Requests return Javascript Errors
Added test and doc
Merge pull request #33 from gflandre/fix-errors

Requests return Javascript Errors
Prepare v1.3.0
Added more error information when a stripe error occurs.
list methods should all support object as an argument
my previous shorthand option is stupid. this is better
Added documentation for the error object.
Updated the errors test for the new error object.
Removed console log.
Merge pull request #38 from onmodulus/master

Added a few more properties to Errors returned from Stripe
Add charges.capture method

Data is optional. If given, it should be an object with the parameters amount and/or application_fee. 
Update README.rd, adding charges.capture
Adding tests for charges.capture

Two new tests: capture a charge fully, and only part of a charge.
Implemented feedback from @abh
updated documentation
added vows to devDependencies
Merge pull request #37 from slajax/master

Pass an object as an argument to customer.list and coupons.list
Merge pull request #32 from forty/master

Handle HTTP error to avoid throwing exceptions