[WIP] Golang Boilerplate Service

[darahayes]

This is a work in progress. The code is structured with the philosophy that there is a clear separation between the business logic and the server logic.

Some things that still need to be done:

• Finalize folder structure. I am aware that it's good practice to put the binary/entrypoint into a cmd folder
• Decide on App configuration =. What configuration items should there be? e.g. DBConnectionString and also decide on how we should allow configuration. E.g. env variables, flags, config files. (personally I'm leaning towards env variables, envconfig looks pretty interesting.)
• Need to figure out a good solution to logging.
• testing - Right now there's a single blank test just to get the CircleCI stuff in place
• refactor to pass by reference where appropriate. At the moment everything is passed by value. Certain things like app should definitely be passed by reference.
• Better Docs (Readme and GoDocs)