2.0.0-alpha.2

Minor fixes:

• Make BasicAuth URL-encode client ID and secret (#41)
• Fix Display + Fail derivation for RequestTokenError<T>
• Run rustfmt +nightly

2.0.0-alpha.1

Unstable release following major rewrite: this release includes breaking changes!

• Adds extensibility to support arbitrary OAuth 2.0 extensions in the
  future without having to break backward compatibility again. This is
  primarily accomplished through traits and generics (Resolves #27).
• Improves adherence to the OAuth 2.0 spec (RFC 6749):
  • Requires access token responses to be JSON-encoded, dropping support
    for form-encoded responses. Also adds the HTTP request header
    "Accept: application/json" to ensure that loosely compliant OAuth2
    implementations such as GitHub's return a JSON response (Resolves #33).
  • Fixes the access token error response types enum to follow Section
    5.2 of the spec instead of 4.2.2.1, which is for the Implicit Grant
    flow only. The Implicit Grant errors are only seen by the browser,
    and not by client applications that would be using this library.
  • Fixes parsing of the "scope" token response field, which is a
    space-delimited string instead of a JSON array of strings.
  • Removes the "state" field from the token error response, which is not
    defined in Section 5.2 of the spec. This field is only returned by
    earlier steps in the OAuth2 flows.
  • Only parses the access token response as an error if the client
    receives a non-200 HTTP response code. Section 5.2 of the spec defines
    the expected response code as 400 Bad Request.
  • Uses HTTP Basic Auth for client authentication by default, rather
    than including the client_id and client_secret in the request body.
    This matches the recommendation in Section 2.3.1 of the spec.
• Slightly improves the usability of the library
  • Renames the main struct from Config to Client.
  • Makes the "state" parameter mandatory unless the "insecure" module is
    used (Fixes #28). This is critical to protect clients against CSRF.
  • Improves the documentation to more closely refer to the spec.
  • Improves the examples to include CSRF protection.
• Adds stronger typing using the NewType pattern

1.3.0

• Support for refresh tokens. Thanks @Noskcaj19
• Added the Clone trait on Config. Thanks @illicitonion

1.2.1

• Added the Serialize trait on Token, TokenError and friends, in case you want to serialize it in your app.

1.2.0

• Allow using basic auth to pass client_id and client_secret. Thanks @euank
• Pass the scope for the client credentials grant type. Thansk @euank
• Parse errors even for non-200 status codes. Thanks @andor44

1.1.2

• Allow passing authorization URLs with query parameters (without resetting the query parameters beforehand).

Thanks to @KeenS

1.1.1

• Implemented the std::error::Error trait for TokenError. The description of the error is the display value of ErrorType (e.g. invalid_request, unauthorized_client etc.)

Thanks to @KeenS

1.0.1

• Fixed a bug when setting multiple scopes: the separator should be a single whitespace, not a comma.

1.0.0

• A big rewrite: see the docs for more details.