Add Hatchet

[gshutler]

http://gshutler.com/hatchet/
https://github.com/gshutler/hatchet

Pluggable logging library. Comes with an adapter for the stdlib Logger out of the box, custom appenders and formatters are POROs.

• 1696 LoC
• 438.8 flog total, 4.5 flog/method average
• No dependencies
• No monkey patching
• Been in production use since creation