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

include/errcode.h

include/pickle.h

src/box/bitset_index.cc

src/box/box_lua.cc

src/box/space.cc

src/box/tree_index.cc

src/box/tuple.cc

src/box/tuple_update.cc

src/lib/bitset/expr.c

src/lib/bitset/index.c

src/lib/bitset/page.h

src/memcached.cc

test/box/lua.result

test/box/lua_misc.result

test/lib/sql_ast.py