added diagram for examples and SAREF4CITY validation workshop slides

* Multi-line labels
* URL definitions in isDefinedBy
* The definition of geo:location

Added axiom for local restrictions for the S4CITY ontology

reuse of geosp classes and properties
updated diagram

Added KPI value for decoupling KPI definition and value
Added time:Instant
Andre relation between KPI value and measurements
Added foam:Agent hierarchy
Added takesPlaceAtFacility
Deleted Rule
Deleted aggregatesData
Deleted NonConvexInterval

Diagram with datatype properties
Proposal for KPI decoupling

new diagram with properties.
added skos:Concept

Smart Cities -> Smart City

Smart Cities domain -> Smart City domain

change Smart Ctities to Smart City

First version with full terminology. Axioms and restrictions not added.

added rdfs labels and comments

Setup for folder and empty ontology for s4city