Merge branch 'feature-feeder-in-core-merge'

.gitignore

CMakeLists.txt

cfg/core_cfg.cfg_tmpl

cfg/tarantool_box_cfg.c

cfg/tarantool_box_cfg.cfg

cfg/tarantool_box_cfg.h

cfg/tarantool_feeder_cfg.c

cfg/tarantool_feeder_cfg.cfg

cfg/tarantool_feeder_cfg.h

core/CMakeLists.txt

core/admin.m

core/admin.rl

core/fiber.m

core/log_io.m

core/log_io_remote.m

core/replication.m

core/tarantool.m

include/fiber.h

include/log_io.h

include/replication.h