code in common between getJSONResponse and getJSONEnvelope
access token is optional on some calls
users API complete + some refactorings, pushing the plumbing into Monad
relationship API + refactorings (get/post, take OAuthToken everywhere)
ID types used in data types
warnings
media API
centralize parameter encoding via TypeClass
Comments API
Likes API + some documentation fixes
Documentation
Locations + error handling
geographies
readme + cabal: link to sample app
verify signatures on real time notifications
Merge pull request #5 from JPMoresmau/master

Enhanced API coverage