update version of lwes
Version 5.0.0 (molinaro)
  * serialization of events now happens in calling process instead of while
  sending
  * make send_interval an application variable so you can change it from 60
  seconds if you want
  * mondemand:stats/0 now adds context when it's available
  * trace messages now always use dicts internally to better match other
  languages implementations
Added gauges, emitting to multiple channels, caps on counters and a stats module