New MongoDB C++ driver documentation website

[David Golden]

Hello, MongoDB C++ users.

We're pleased to announce the launch of our new MongoDB C++ Driver Manual website.

This site supersedes the old wiki documentation (though has most of the same content), and includes newly-rendered API Documentation for all recent releases.

It's still a work in progress.  If you find errors or omissions, please feel free to open a JIRA ticket to let us know.