Send acknowledgments when Mem/CPU profiling is finished

[Unitech]

E.G.: https://github.com/keymetrics/pmx-2/blob/master/src/profiling/profilingCPU.ts#L50

Send a message like:

   this.transport.send({
      type : 'profiling:cpu:finished',
      data : {
           filesize : '20mb'
      }
    }, false)

[wallet77]

If multiple profiling are launched, do we need an unique id ? Action "km:cpu:profiling:start" can return an id and each response should attach this identifier in response's body.

[vmarchaud]

Indeed ! We should just add a unique_id field with an UUID.

[Unitech]

Great addin

[wallet77]

Done : https://github.com/keymetrics/pmx-2/pull/45