Added sniply
Added credits to the README
Create CONTRIBUTING.md
Copyright year bump
Fixes the README examples of using the access token properties
Merge pull request #100 from benjisg/fix-README-token-properties

Fixes the README examples of using the access token properties
Merge branch 'master' of https://github.com/thephpleague/oauth2-client

* 'master' of https://github.com/thephpleague/oauth2-client:
  Fixes the README examples of using the access token properties
  Copyright year bump
  Create CONTRIBUTING.md
  Added credits to the README
  Added sniply