Merge branch 'unify-u32-types'

include/box/box.h

include/errcode.h

src/box/bitset_index.m

src/box/box.m

src/box/box_lua.m

src/box/box_lua_space.m

src/box/hash_index.m

src/box/index.h

src/box/index.m

src/box/request.m

src/box/space.h

src/box/space.m

src/box/tree_index.m

src/box/tuple.h

src/box/tuple.m

test/box/lua.result