Added domain properties to the SAREF4AGRI extension: soil moisture,
irrigation water, soil temperature, air temperature, ambient humidity,
precipitation and plant growth stage

created s4agri:Deployment to include local restrictions

replace s4agri namespace for:
sosa:Platform, ssn:System, ssn:Deployment and related properties

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

Update revision and included diagram.

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

Added readme for SAREF4AGRI