New authentication API, with support for a web flow
Add a server parameter to web login method
Split the setters for user agent and client ID/secret
Require +setUserAgent: before any client creation
Clarify 2FA flow for SMS vs. app
Add GCD queue and methods for global client settings
s/logIn/signIn/
Expose OAuth token so it can be saved
Make OCTAuthorization.h private
Remove OCTAuthorization.h from umbrella header
Add class representing a token from the web flow
Refactor OCTClient authentication methods
Token authorization doesn't work, apparently
Get rid of manual callbackURLs, they're ridden with problems

It appears the API rejects some URLs even when they're not different, and then doesn't honor it anyways.
Only allow application/json from the access_token API
Complete +authorizeWithServerUsingWebBrowser:… after 1 token
Don't error in -enqueueUserRequest… if we're authed
Rename +handleCallbackURL:
Refactor existing unit tests to work with the new APIs
++RAC to v2.1.5