spaces represent in lua by lbox_pushspace()

src/CMakeLists.txt

src/box/box.lua

src/box/index.h

src/box/space.m

src/lua/init.m

src/lua/space.h

src/lua/space.m

src/memcached.m

src/tarantool.m

test/box/admin.test

test/box/lua.result

test/box/space.result

test/box/space.test

test/run

test/run

test/tarantool