Thanks to [Peter Higgins](https://github.com/phiggins).

* Add support for matching parameter values using a regular expression
  as well as a string. Thanks to [Oleg M Prozorov](https://github.com/oleg).

* Fix integration with httpclient as the internal API has changed.
  Thanks to [Frank Prößdorf](https://github.com/endor).

* Ensure Curl::Easy#content_type is always set. Thanks to [Peter
  Higgins](https://github.com/phiggins).

* Fix bug with em-http-request adapter stubbing responses that have a
  chunked transfer encoding. Thanks to [Myron
  Marston](https://github.com/myronmarston).

* Fix a load of spec failures with Patron, httpclient, and specs that
  depended on the behaviour of example.com. Thanks to [Alex
  Grigorovich](https://github.com/grig).