UpdatingPV class
- Merge branch updating-pv from RAD-Student
- Explore classes UpdatingPV and TestUpdatingPV
- Understand the difference true vs false in the second argument of the UpdatePV constructor.
- Switch to UpdatingPV instead of new Channel in Cavity for amplitude and phase.
- It will not directly work for the waveform. Modify UpdatingPV to handle array as well as a single value.