Merge remote-tracking branch 'origin/gh-736-reference'

doc/sphinx/.gitignore

doc/sphinx/_templates/base

doc/sphinx/conf.py

doc/sphinx/ext/__init__.py

doc/sphinx/ext/filters.py

doc/sphinx/reference/box_session.rst

doc/sphinx/reference/console.rst

doc/sphinx/reference/digest.rst

doc/sphinx/reference/expirationd.rst

doc/sphinx/reference/fiber-ipc.rst

doc/sphinx/reference/fiber.rst

doc/sphinx/reference/fio.rst

doc/sphinx/reference/json.rst

doc/sphinx/reference/log.rst

doc/sphinx/reference/msgpack.rst

doc/sphinx/reference/other.rst

doc/sphinx/reference/pickle.rst

doc/sphinx/reference/socket.rst

doc/sphinx/reference/tap.rst

doc/sphinx/reference/uuid.rst