Update kambal.js to use CoffeeScript template for JS code
Update chapter_coffee.js with a TODO for templating
Create and complete updating_the_bicycle_class
Create creating_a_parts_hierarchy
Complete creating_a_parts_hierarchy
Create and complete composing_the_parts_object
FIXME: use CoffeeScript Comprehension to emulate Ruby's Array#select
Merge branch 'ch8'