[4.1] Disambiguate versions
Merge pull request #203 from SammyK/update-readme-badge-4.1

[4.1] Disambiguate versions
Reverted URL encoding behavior on FacebookRedirectLoginHelper
Refactored request/response.
Merge pull request #169 from SammyK/simple-request-response-refactor

[4.1] Simple request response refactor