Prevent respawn of child when stopping

Signed-off-by: chatgris <jboyer@af83.com>
Do not listen to CHLD signal when stopping

Signed-off-by: chatgris <jboyer@af83.com>
Bump version for prerelease

Signed-off-by: chatgris <jboyer@af83.com>
Merge branch 'thread' into http
Expose supervision information in json

This may be used for monitoring, and building tools like dashboard.

Response:

    {
      "supervisor":{
        "pid":11537,
        "pctcpu":0.0,
        "pctmem":0.22
      },
      "children":[
        {
          "pid":11540,
          "pctcpu":0.0,
          "pctmem":0.21
        },
        {
          "pid":11543,
          "pctcpu":0.0,
          "pctmem":0.21
        },
        {
          "pid":11546,
          "pctcpu":0.0,
          "pctmem":0.21
        },
        {
          "pid":11549,
          "pctcpu":0.0,
          "pctmem":0.21
        }
      ]
    }

Signed-off-by: chatgris <jboyer@af83.com>