Tarantool NginX upstream module is released

This is the first release of Tarantool NginX upstream module Key features: Benefit from nginx features and tarantool features over HTTP(S). Call tarantool methods via JSON RPC. Load Balancing with elastic configuration. Backup and fault tolerance. low overhead. Nice speed, CPU/Memory usage. For details see README.md https://github.com/tarantool/nginx_upstream_module