Changed the Wearer to be a subclass of LivingOrganism instead of FeatureOfInterest.

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 (").

ontology/saref4wear.ttl

@@ -272,8 +272,8 @@ s4wear:isLocatedOn rdf:type owl:ObjectProperty ;
 s4wear:isSensedBy rdf:type owl:ObjectProperty ;
                   rdfs:domain s4wear:Wearer ;
                   rdfs:range s4wear:Wearable ;
-                  rdfs:comment """Defines the relatonship between a wearer and a wearable device.
-The definition of this object property satisfies the requirement WEAR-2.""" ;
+                  rdfs:comment "Defines the relatonship between a wearer and a wearable device.
+The definition of this object property satisfies the requirement WEAR-2." ;
                   rdfs:label "is sensed by"@en .
 
 
@@ -805,8 +805,8 @@ s4wear:User rdf:type owl:Class ;
 ###  https://saref.etsi.org/saref4wear/Wearable
 s4wear:Wearable rdf:type owl:Class ;
                 rdfs:subClassOf saref:Device ;
-                rdfs:comment """A wearable device is a device that is intended to be located near, on or in an organism.
-The definition of this concept satisfies the requirement WEAR-1."""@en ;
+                rdfs:comment "A wearable device is a device that is intended to be located near, on or in an organism.
+The definition of this concept satisfies the requirement WEAR-1."@en ;
                 rdfs:label "Wearable device"@en .
 
 
@@ -816,7 +816,7 @@ s4wear:WearableComponent rdf:type owl:Class .
 
 ###  https://saref.etsi.org/saref4wear/Wearer
 s4wear:Wearer rdf:type owl:Class ;
-              rdfs:subClassOf [ owl:intersectionOf ( saref:FeatureOfInterest
+              rdfs:subClassOf [ owl:intersectionOf ( s4wear:LivingOrganism
                                                      [ rdf:type owl:Restriction ;
                                                        owl:onProperty s4wear:isSensedBy ;
                                                        owl:someValuesFrom s4wear:Wearable
@@ -824,8 +824,8 @@ s4wear:Wearer rdf:type owl:Class ;
                                                    ) ;
                                 rdf:type owl:Class
                               ] ;
-              rdfs:comment """A wearer is any living organism that is sensed by a wearable.
-The definition of this concept satisfies the requirement WEAR-2."""@en ;
+              rdfs:comment "A wearer is any living organism that is sensed by a wearable.
+The definition of this concept satisfies the requirement WEAR-2."@en ;
               rdfs:label "Wearer"@en .