- changed .gitignore file to ignore the "nbproject" directory.
- changed the ShootWithThree command class to a ShooterAutonomous command
  class that takes two args: the numbers of disks to shoot, and a boolean
  indicating whether or not the robot is starting to the left of the
  ladder. This way, we get four separate (but very similar) autonomous
  programs based on which corner of the ladder the robot starts at. The
  class is also very easily extensible to new features.
- changed the ShooterAutonomous class so that shooter power scales with
  the inverse of the battery voltage.
- Bugfix: calling turnOff() on the shooter/climber now sets the speed to
  0.
- updated TODO list.