Merge remote-tracking branch 'origin/master' into 1.6

doc/sphinx/_static/sphinx_design.css

doc/sphinx/book/administration.rst

doc/sphinx/book/app/c_lua_tutorial.rst

doc/sphinx/book/app/d_plugins.rst

doc/sphinx/book/box/admin.rst

doc/sphinx/book/box/atomic.rst

doc/sphinx/book/box/authentication.rst

doc/sphinx/book/box/box_index.rst

doc/sphinx/book/box/box_introspection.rst

doc/sphinx/book/box/box_schema.rst

doc/sphinx/book/box/box_session.rst

doc/sphinx/book/box/box_space.rst

doc/sphinx/book/box/box_tuple.rst

doc/sphinx/book/box/index.rst

doc/sphinx/book/box/triggers.rst

doc/sphinx/book/configuration/cfg-basic.rst

doc/sphinx/book/configuration/cfg-snapshot_daemon.rst

doc/sphinx/book/configuration/index.rst

doc/sphinx/book/connectors/__c.rst

doc/sphinx/book/intro.rst