Bubble chart and filter ability implemented.

A bubble chart of the cereal in a1-cereals.csv was created using
CoffeeScript, the output displays in index.html. The user can choose to
show "Cereal by Manufacturer." which parses the cereal into manufacturer
columns with a damping-force animation.
Updated README.
Merge pull request #1 from Glchriste/master

Bubble chart and filter ability implemented.