In the execute command, need an else statement that will set the winch speed to zero when the stick isn't being run in the down direction. As is, this code will just keep driving the winch (at the last speed it was run at) if the if statement condition doesn't evaluate true.
https://github.com/Team2168/FRC2014_Main_Robot/blob/master/src/org/team2168/commands/WinchWithJoystick.java#L29
In the execute command, need an else statement that will set the winch speed to zero when the stick isn't being run in the down direction. As is, this code will just keep driving the winch (at the last speed it was run at) if the if statement condition doesn't evaluate true.