Renamed CommunicationFunction to CommunicatingFunction and put as subclass of saref:EventFunction. Issue #21

Closes #1.

Removed the restrictions on geo:SpatialObject. These restrictions are not defined in GeoSPARQL and we should just reuse it, not redefine it.

Closes #29.

* saref:Device s4wear:measuresFeature saref:FeatureOfInterest
* saref:Device s4wear:controlsFeature saref:FeatureOfInterest
* saref:FeatureOfInterest s4wear:featureIsMeasuredByDevice saref:Device
* saref:FeatureOfInterest s4wear:featureIsControlledByDevice saref:Device

These make redundant the following, so they are removed: s4wear:isSensedBy, s4wear:isActedBy, and s4wear:isActuatedBy.

Closes #17.

Added the class Occurrence as a superclass of Event, since it is more generic, that takes place in some location.

Added that an occurrence is detected by some device.

* Information and its hierarchy
* The hasDeviceInformation property
* The emittedTemperature property

Closes #18.

Implemented the changes that were not merged correctly and removing the Area concept that suddenly appeared again.

I also fixed the label.

Defined Wearable as a subclass of a geosp:Feature so it is a spatial feature with a location and so on.

I think that the Area class refers to the s4city:AdministrativeArea one, which is already defined in SAREF4WEAR. So I remove it.

Also, the capacity is the capacity of a Facility (A place, amenity, or piece of equipment provided for a particular purpose.), but not of an Administrative area (An administrative division, unit, entity, area or region, also referred to as a subnational entity, constituent unit, or country subdivision, is a portion of a country or other region delineated for the purpose of administration.).

Changed the domain of sendsNotificationsTo to Wearable, since a Device does not have the notion of having a Wearer (and the Wearable does).

It is the way in which it is made in User and also LivingOrganism is already defined as a FeatureOfInterest.

I also changed three comments from multi-line (""") to single line (").