Tapping: Create a Beer Tap Module that manages Servo's and Pump based on sensor and Raspberry Pi input

[Diego-Brandjes]

DOD:

• Servo's and pump need to be maintained based on how much weight (liters) have been pumped from the tank.
• Needs to be a class that can be called from the main.
• Is able to pause without 'forgetting' how much has already been tapped when state is changed to paused.
• Needs to recognize during an update that the beer tap should stop.
• Needs to work on a tick based system where an 'update' method updates the current state of the system based on input. The class can't block the main loop.