Application skeleton.
Add missing dependency: koa-qs
Add brewberry ui
Core skeleton
Server endpoint: Log
Handle new endpoint format
Brew route endpoint
SparkCore mocked device
SparkCore device
Implement core emitter
Events in core
Use core with server
Refactor frontend
Use Core emitter instead of the device own emitter.
Merge pull request #1 from brewfactory/feature/core-emitter

[WIP] Implement core emitter
Fix indent issue.