Add a Jaeger client logger wrapper around go-kit logger

[sagikazarmark]

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[coveralls]

Coverage remained the same at 100.0% when pulling 36488aa on sagikazarmark:kitlogger into 3b2a9ad on uber:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 9a57124 on sagikazarmark:kitlogger into 3b2a9ad on uber:master.

[coveralls]

Coverage remained the same at 100.0% when pulling ad7bb41 on sagikazarmark:kitlogger into 3b2a9ad on uber:master.