* Updates to URI unit tests and documentation.

* More documentation, covering the HTTP Client and HTTP Server APIs

* Asynchronous HTTP Server that now supports running request handlers on a

different thread pool.

* An initial thread pool implementation, using Boost.Asio underneath.

* Adding a ready(...) wrapper to check whether a response object returned by

the asynchronous client in 0.7 already has all the parts available.

* Some attempts at lowering compile time costs.

:mod:`cpp-netlib` 0.7