OnToology update

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

OnToology update

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