PS-68 add new branding solution for integrations

Some of the branding info was removed in https://github.com/everydayhero/developer.everydayhero.com/pull/16 but clients need to know which parameters are required to get branding for integrations.

- [ ] peer review


![everydayhero_api__oauth_integration](https://f.cloud.github.com/assets/486512/1293834/d987fcce-306d-11e3-9747-183304a9ed71.jpg)