Create 9a - first round of tests
Update 9a -> implement foundation of classes and tests, add 4 FIXME to 9aSpec
Update 9aSpec to abstract Wheel and Gear in their own modules
Complete 4 FIXME in 9aSpec
Remove 9a.rb from tracking
Use CoffeeScript to clean Gear and Wheel implementation; update specs
Update Gear_9b, Wheel_9b, 9bSpec
Create and complete DiameterDouble
Finish section: Testing Incoming Messages
Create and complete 9dSpec
Organize ch9 by code sections
Create and complete samples from 93
Taking a break: DiameterDouble
Finish DiameterDouble + spec
Create Bicycle and RoadBike base classes
Complete implementation for BicycleInterfaceTest
Update Bicycle, BicycleInterfaceTest; create BicycleSpec and xsions
Write enough implementation for BicycleInterfaceTest Module
Update BicycleInterfaceTest
Modularize and automate test interfaces for Bicycle and RoadBike