Data science 20141007 rc

Revisions based on Pull Request: https://github.com/jmmastey/level_up_exercises/pull/150

-clean up errors with main file
-add test_no_winner json data and tests
-convert main.rb into a Results class which takes the calculations from Dataset and wraps in some nice output
-using Hirb gem to format the console output
Funny enough, I had the setup you described earlier but took it out due to some other PR feedback: https://github.com/ryancowan/level_up_exercises/commit/af4a17d45124d3cd6a5c60850bea192d4e42d7c4

The argument was that results really didn't need to be accessible outside the class wrapper.