Clarify behavior of -[BTCoinbase providerAppSwitchAvailableForClient:]
Clarify behavior of -[BTCoinbase providerAppSwitchAvailableForClient:]

- Previous comment was inaccurate because this method actually returns
  NO if your Braintree configuration does not enable Coinbase
- To check whether the Coinbase native app is installed, developers
  may use CoinbaseOAuth (in the Coinbase SDK) directly

billCTG/braintree_ios,Feverup/braintree_ios,bytemarkinc/braintree_ios,EverettQuebral/braintree_ios,apascual/braintree_ios,TeachersPayTeachers/braintree_ios,Feverup/braintree_ios,billCTG/braintree_ios,EverettQuebral/braintree_ios,Feverup/braintree_ios,EverettQuebral/braintree_ios,billCTG/braintree_ios,braintree/braintree_ios,apascual/braintree_ios,TeachersPayTeachers/braintree_ios,billCTG/braintree_ios,Feverup/braintree_ios,TeachersPayTeachers/braintree_ios,bytemarkinc/braintree_ios,apascual/braintree_ios,EverettQuebral/braintree_ios,TeachersPayTeachers/braintree_ios,apascual/braintree_ios,bytemarkinc/braintree_ios,braintree/braintree_ios,EverettQuebral/braintree_ios,bytemarkinc/braintree_ios,braintree/braintree_ios,braintree/braintree_ios,bytemarkinc/braintree_ios,billCTG/braintree_ios,TeachersPayTeachers/braintree_ios