update URI to SAREF for: FeatureOfInterest, isPropertyOf, hasProperty,
hasFeatureOfInterest, isFeatureOfInterestOf and measurementMadeBy

OnToology update

Extended foaf:Agent by s4city:Agent. Replaces occurrences of
foaf:Agent. Updated diagram and HTML

Removed skos and dc annotations

Update revision and included diagram.

OnToology update

Added comments for all entities.

Some links to SSN/SOSA have been indicated.

Added labels and comments.
Added deployment time and spatial relations.
Changed saref:consistOf property for the networks componency for the
Constituency pattern relationships.

fix uri on the ontology file

Add documentation of SAREF4INMA