Log Message:
Update mongo-c-driver to 1.0.0.

A new libmongoc-priv.so library is installed that does not have symbols
hidden. You can access private headers via the -private.h variants. This
means you will need to recompile your project every time the library is
changed (if you use those private headers, as they are subject to change).

For other minor changes, see commits made since 0.98.0:

https://github.com/mongodb/mongo-c-driver/compare/0.98.0...1.0.0