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
Move pry to shared test and dev group
Add Jesse and Luke to git pair config
Add a RankedList module to call ranking objects
Add sean to git pair config
Implement new and create for Idea
Add Jeramy to git pair config
Remove unused pending spec
Implement ideas index page
Redirect to idea index after create
Set root route to idea index
Add validation for ideas
Add new idea button to index
Add code climate badge

* closes roguerb/voterama#3