In libbson, my new team member Kyle Suarez improved the documentation with an example of streaming BSON over a socket, and added pages for the callback function types
In libmongoc, Jason Carey and Hannes Magnusson fixed an assortment of undetected network errors when sending messages to the server, and Jason plugged a memory leak when the driver parses a URI that contains an invalid option. Jose Sebastian Battig contributed a patch for an off-by-one error in mongoc_gridfs_file_seek with mode SEEK_END. GitHub user "rubicks" updated the libbson submodule's URL to use the recommended "https://" instead of "git://".
The documentation is here:
Thanks to everyone who contributed to the development of this release!