Removed blank nodes in SAREF4AGRI

Merged Use case 1 and 2 models

updated diagram SAREF4AGRI

New diagram including livestock use case

OnToology update

change date in measurement in SAREF4AGRI smart irrigation example

added in the SAREF4AGRI example for smart irrigation 2 triples to state
that the sensors saref:measuresProperty s4agri:SoilMoisture

Code for a basic example of SAREF4AGRI for the smart irrigation use
case.

OnToology update

Deleted Node, Network, Communication and CommunicationRole concepts and
related properties and attributes.

OnToology update

changed version to 1.0.1 (adopting new versioning scheme)

solved typo “wight -> weight” in s4bldg:operatingWeight label

OnToology update

s4bldg:operatingWight to s4bldg:operatingWight

Thanks to @GeorgFerdinandSchneider

OnToology update