Allow operator to spin intake wheels while pinching/releasing intake

[nathan815]

The commands for raising/lowering and pinching/releasing the intake never return true in isFinished. I think this is the reason they remain active and the operator control doesn't allow both at the same time. We need to change this so the intake wheels can be spun up before or while pinching/releasing the intake. I think simply returning true in the commands' isFinished methods will work because as long as execute is ran once it's fine (the solenoid only needs to be set once).