Merge branch 'master' of github.com:tarantool/tarantool

CMakeLists.txt

README.md

doc/box-protocol.txt

doc/user/connectors.xml

doc/user/plugins.xml

doc/user/preface.xml

doc/user/tutorial.xml

doc/www-data.in/_layout/index

doc/www-data.in/_text/index.md

doc/www-data.in/_text/intro.md

doc/www-data.in/download.cmake

src/CMakeLists.txt

src/box/CMakeLists.txt

src/box/alter.cc

src/box/box.cc

src/box/engine.cc

src/box/engine.h

src/box/engine_memtx.cc

src/box/engine_memtx.h

src/box/engine_sophia.cc