Implements toString method in Car.java. Test - canDoToString in CarTest.java passes.
Adds canDecelerate test in CarTest.java. Test Fails.
Implements the decelerate method in Car.java. CarTest.java test canDecelerate now passes.
Creates cannotDecelerateBeyondZero test in CarTest.java. Test Fails.
Changes decelerate method in Car.java. Test cannotDecelerateBeyondZero in CarTest.java passes. Test canDecelerate still passes.