The URI parser now correctly handles an empty port (e.g. http://www.example.com:/).
Updated reference to Boost version in README.rst.
Removed pimpl_ in the uri class, in order to avoid having the move constructor allocate memory.
Compiles and all tests pass on Windows 2012.
Merge pull request #21 from glynos/depimplize

Fixing #17 in a better way