first commit! Start car class!
Add @price attribute to Car class
Create "depreciation" method for the car

* Create specific age_depreciation method based on that
Begin UsedCar class

* support adding mileage
Add Damage class
Update UsedCar to deal with damages
Recalculate price when value changes
Set my car on fire. Oops!!
Create CarLot class
Testing CarLot --- it works! yay!
Add method to search for car by color
Updated lot searching methods
Add vehicle_id functionality