Add JSON logging support to Stunner.

[ChaturvediShilpa]

Hi,

Currently, the Stunner code uses Pion logging and prints each log line by line. This makes it difficult to do machine parsing of logs specially for multiple lines of stack trace.

I have raised a PR for adding JSON based logging support - #207
kindly review and let me know your feedback.

Thanks

[rg0now]

This is a long-requested feature by many, so thanks for bringing this up. As per the specific PR: I'm afraid we'll have to reject it for now (see comments there). I'll also suggest other ways to reach the same effect so please bear with us.

I'll leave this issue open so that we won't forget to tackle this in the near future.