API wrapper

I've written an API wrapper that takes advantage of OmniAuth Fitbit's OAuth dependencies. It's fairly simple to use, and doesn't alter the way the existing OmniAuth strategy works. All of the code is in lib/api/fitbit_api.rb, the tests are in spec/api/fitbit_api.spec  and spec/fitbit_api_helper.rb. Let me know if you have any questions.

This is the second OmniAuth OAuth strategy + API wrapper I've written. The first was https://github.com/scrawlon/fatsecret-omniauth