Updated ontology, images, profiles, examples, Added ontology-snippets

* License type is now a property instead of defined by class
* Environment is now a property instead of defined by class
* Renamed #installedIn to #requiresInstallation
* Renamed #isHostedAt to #requiresSource
* Renamed #Activity to #Processor

* Changed measures to purl.org
* Object input in executable plan profile is now obligatory
* Fixed predefined parameter annotation cardinality for some profiles