logging prototyping

- implemented some simple logging facilities (only logs to std
currently)
- extended go-logging so that we can provide child loggers to incoming
requests
- parametrized port and logging level
- server now logs incoming and outgoing api requests (pretty prints req
and res headers as json)
a todo

a todo
comment fix

comment fix
no reason to copy log rather than pass ptr

no reason to copy log rather than pass ptr
Merge pull request #24 from wafflehaus/proto-logging

logging prototyping