Create a reference driver structure/model based on MAX31855

[chron0]

• Connect/Drive/Read GPIOs
• Expose config/features to UI

[chron0]

Mocks, Model & Client implementation are in a basic data-driven and usable state. The next step will be how to structure and automatically import/group by folder all plugins to create a JSON Object which can be fed to the client via websocket, example:

Server:

├── __init__.py
├── controller
│   ├── __init__.py
│   └── pid-temp
│       └── pid-temp.py
├── input
│   ├── __init__.py
│   ├── hx711
│   │   ├── example.py
│   │   ├── hx711.py
│   │   ├── hx711_gist_alternate.py
│   │   └── wiring_example.jpg
│   ├── max31855
│   │   └── max31855.py
│   ├── max31856
│   │   └── max31856.py
│   └── max6675
│       └── max6675.py
└── output
    ├── PCA9685
    │   ├── PCA9685.py
    │   └── __init__.py
    ├── TLC5947
    │   └── tlc5947.py
    └── __init__.py

Should produce this JSON Object for the client, see https://github.com/apollo-ng/governess/blob/master/client/src/providers/plugins/plugins.mock.ts for full example, as an excerpt:

    {
      'pid': '6jy2rwNevEy3',
      'driver': 'MAX31855 Thermocouple Adapter Driver',
      'name': 'MAX31855 Thermocouple Adapter Driver',
      'desc': '',
      'group': 'SPI',
      'unit': '°C',
      'color': 'rgba(191, 128, 6, 0.75)',
      'icon': 'thermometer',
      'conf': [
        { 'name': 'UNIT', 'value': '°C' },
        { 'name': 'SAMPLE-BIN-SIZE', 'type': 'int', 'unit': 's', 'value': 1, 'min': 1, 'max': 16 },
        { 'name': 'SAMPLE-INTERVAL', 'type': 'int', 'unit': 's', 'value': 1, 'min': 0.1, 'max': '' },
        { 'name': 'STORE-INTERVAL', 'type': 'int', 'unit': 's', 'value': 1, 'min': 0, 'max': '' },
        { 'name': 'DB-DISPLAY-SHOW', 'type': 'boolean', 'value': true },
      ],
      'input': [
        { 'name': 'CSEL', 'type': 'hostGPIO', 'value': '' },
        { 'name': 'CLCK', 'type': 'hostGPIO', 'value': '' },
        { 'name': 'DATA', 'type': 'hostGPIO', 'value': '' },
      ],
      'output': [
        { 'name': 'TEMP', 'type': 'float', 'unit': '°C' },
      ],
    },