Make plumbing less opinionated

[amotl]

About

With currently ongoing refactorings, we are intending to make Kotori's plumbing less opinionated.

Details

For example, the documentation provides two different scenarios how to acquire data using different MQTT topic styles, MQTTKit application vs. Basic application.

Now that we standardized the MQTTKit flavour with SensorWAN, and added a per-device addressing scheme with GH-136, the Basic application can be dissolved safely.

[amotl]

We think there should be a configuration-less alternative to starting Kotori for quick ramp up and evaluation purposes.

kotori --enable=sensorwan