Merge remote-tracking branch 'origin/master'

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/index.cc

src/box/index.h

src/box/key_def.h

src/box/schema.cc

src/box/space.cc

src/box/space.h

src/lib/salad/rlist.h