• Replaced hyper with curl + http-muncher: resulted in a significant speed improvement and support for Windows.

• Fix a bug where response headers were unordered & duplicate header field names were not allowed.

Thanks to @alyssais

• Run the mock server on 127.0.0.1 (instead of 0.0.0.0).

Thanks to @alyssais

• Update serde suite to v1.
• Rewrite internal server to talk JSON (via serde).
• Expose the mockito::start() method so Mockito can be used as a standalone mock server (API documentation on that is missing though).

• Introduced advanced header matchers: Matcher::Any to match only by the field name and Matcher::Missing to match the absence of a particular header. These are used within the Mock::match_header call.
• The old behaviour of matching the header value by &str was kept backwards compatible.

• Explicitly set an empty body for non-matching routes (prevents hanging requests for non-matching routes).
• Added more tests.