Major Refactor

[rmagen]

Adding this in retrospect for documentation's sake:

A much needed refactor to split Unipop's code to different components:

• Structure - implementation of default Tinkerpop model classes that issue UniQuerys to Controllers
• Procces - implementation of Tinkerpop Strategies that issue UniQuerys to Controllers, and add Unipop-specific optimizations.
• UniQuery - a set of APIs Controllers can implement.
• Controller - a component responsible for executing the different UniQuerys.
• Schema - a set of helper classes meant to ease schema management for Controllers, and standardize schema mappings.