Facebook-utils

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- packaging fix
- flake8
- version number now in library itself

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- support for non-authenticated queries (such as opengraph lookups)
- api_proxy now supports `get_data` kwarg, which is passed into the `requests` library as `params`.
- FacebookHub now accepts an `unauthenticated_hub` argument
- cleaned up some whitespace
- stashing last-repsonse for later inspection
- supporting inspection of `last_response_ratelimited`

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- aliased `request.registry.settings` to `registry_settings` on setup.

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- added auth_type to FacebookApiUrls.oauth_token__url_dialog
- fixed how auth_type is appended to urls
- BREAKING CHANGE FacebookApiUrls.oauth_code__url_dialog now expects `redirect_uri, scope` NOT `scope, redirect_uri`. this is the only place in the code where `scope` preceded `redirect_uri`.

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- added `auth_type` to `oauth_code__url_dialog` methods (see https://developers.facebook.com/docs/facebook-login/permissions/v2.5adding)
- added `access_token` arg to `api_proxy`
- cleaned up some misc formatting

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- fixed wrong kwargs on `oauth_code__url_access_token` and `self.oauth_code__get_access_token`