fixes #60, correct url for refunding application fees
remove lurk by adding lurk
Merge pull request #61 from stripe/apt-fix-application-fees-url

fixes #60, correct url for refunding application fees
bump to 1.6.5
Whitespace
(BETA) multi-subs support
Per-sub invoices and invoice items
Per-sub discounts
Take multi-subs out of beta

- Use standard API key in multi-subs tests
- Remove 'BETA' comments from new fields/methods
- Add 'legacy' comments to old fields/methods
Fixup API_BASE -> getApiBase bitrot in Subscription

Was changed in cbdda9a7255a6a160c212074f3562489df6558c9