Improved Logging

[christiansmith]

Anvil Connect currently logs with https://github.com/nlf/bucker. There's been some discussion about replacing it with bunyan for a variety of reasons. Here's some background:

• Write Logs for Machines, use JSON
• Service logging in JSON with Bunyan

Before we change anything, it would be good to have some discussion on everyone's goals and requirements for Anvil logging to make sure we have a shared understanding and consensus on what should be happening here.

Questions:

• What should we be logging, and when?
• Are there any special external logging tools we need to support?
• Outside of operational requirements, what are the best ways we can use logs to aid development debugging?

If you have any specific needs, preferences or questions, please post them here.

cc: @tomkersten, @nrhope