* start using build_utils
* simplify woody_client:result_ok() type (issue 10)
* use integer snowflake id
* rename woody_client_thrift:format_return/3 (issue 11)
* provide details to event_handler for http errors (issue 15)
* clarify net_opts() for woody_server_thrift_http_handler:options() type
* switch snoflake to rbkmoney fork
* update readme
* introduce lint and fix lint warnings
* add woody_client:make_id_int/0 API function
