Model Lights and Blinds using ThingDescription ontology

### Why
When the SensorAgent describes it's _capabilites_ (i.e. the set of actuators it manages) to the CoordinatorAgent, it has to do so in terms of the ThingDescription ontology which is used to model device properties, events and actions.

### What
- [ ] model the Philips Hue light representation using the ThingDescription Ontology
- [ ] model the two instances of the blinds representation using the ThingDescription Ontology

### Notes
Start by using a separate ontology file in Turtle (.ttl) syntax, that imports the **context-domain-org** ontology from #6.
To perform the modeling, use either of these two IDEs:
- Protege: https://protege.stanford.edu/products.php#desktop-protege
- TopBraid Composer (the one used in the Skype call): available for download at this URL: https://we.tl/t-87uCjmgZvU