Fix bug in array merge

We were unable to mock charges with more than one refund because the merge was limited by the size of the array in the fixture.

The receiver of the `zip` method limits the size of the output.
Merge pull request #96 from brysgo/patch-1

Fix bug in array merge
Add handler for get /v1/customers/:id/cards

Allow to get all cards for a customer:
Stripe::Customer.retrieve("cu_XXXXX").cards.all(:limit => 3)
Merge pull request #100 from pjambet/master

Add handler for get /v1/customers/:id/cards
Allow Stripe::Token to accept customer id instead of card
Test for Stripe::Token#create error throwing
Added brand attribute to cards
Reformatted refunds array to hash /w data

Matches API changes made on 2014-06-17
Merge branch 'refund-data' into api-2014-06-17

* refund-data:
  Reformatted refunds array to hash /w data
Add an 'id' field to the refunds object
Merge branch 'add-id-to-refunds' of https://github.com/charitywater/stripe-ruby-mock into live-tests
More lenient strategy config
Add message when running live tests
Live test stripe refund id
Test and update helper strategy configuration
Upgrade stripe-ruby gem to 1.14.0