Rough algorithm exploration

Rogue.rb meetup with:
Jeramy, Jesse, Lane, Luke, Sean, and Trevor
Simple combine using aggregate 'algorithm'

* changes combine result from a single array to an array of arrays
* all items in a nested array are of equal priority
Merge pull request #1 from house9/prototype-aggregate

Simple combine using aggregate 'algorithm'
Move pry to test, dev group
Add jesse and luke to git pair config
Add a RankedList module to call ranking objects