Arrays don't display on Shuffleboard

[rzblue]

The ShuffleboardTab.add*Array functions don't actually display the data on shuffleboard. We should remove these functions if they don't do what they say.

[Starlight220]

The problem is Shuffleboard not having a widget for arrays: wpilibsuite/shuffleboard#305

If number arrays with graphs doesn't work anymore, then it was probably broken by the change to NT4.