Bunyan Implementation to start from

[haeferer]

https://github.com/keatec/spark-server/tree/bunyan

Changings : https://github.com/Brewskey/spark-server/compare/dev...keatec:bunyan

currently it should do the exakt same behaviour as original

• additional error logs using StdSerializer
• some debug infos (as sample)
• bunyan request logger on express app (needs LOG_LEVEL debug to work)
• Log incoming Events (needs LOG_LEVEL debug to work)

[haeferer]

Done