Ability to stream command output

[milolav]

I've added ability to stream command output directly to a response. milolav@09642fb

Needed it to monitor manually invoked long running scripts. It is based on a code mentioned in this question https://stackoverflow.com/questions/19292113/not-buffered-http-responsewritter-in-golang

If script starts, a response will always be successful regardless of the exit code.

Would this addition be something in line with project goals?

One issue that I've noticed is when opening hook url in a browser, response gets delayed for a few seconds and I have no idea why. When opening with curl/wget response starts streaming immediately. Implementation from the stackoverflow ( https://play.golang.org/p/PpbPyXbtEs ) doesn't have this issue.

[moorereason]

Thanks for reaching out. We already have an existing issue discussing this feature (#250), so I'm going to close this issue as a duplicate. Further discussion of the feature can happen on #250. You can compare your branch to #251. If you want comments on your implementation, create a PR.