standardize configuration YAML structure and represent it as a POJO

[reynoldsm88]

As an Odinson API user, I would like the configuration YAML structure to be standardized so that I can use it in my projects without having to go back to the code to find out where in the config tree a property is.

Also, as an Odinson API user, I would like the Odinson config structure to be represented as a POJO or case class to make it easier to use with distributed systems like Apache Flink and Apache Spark

Details: I am thinking something similar to what we have done here. Even up to the point of just copying the classes out of that repository into this one.

Let me know what you think.