Added comments to Service, ServiceAgent and ServiceStepMessage.
Merge branch 'development' of https://github.com/hesselmeulenbeld/HUniversal-Production-Utrecht into development
Renamed ProductStepMessage to ProductStep and ServiceStepMessage to ServiceStep because these aren't messages.
Fixed some minor bugs in AbortStep and changed the ontology of it to CancelStep.

Renamed EquipletStepMessage to EquipletStep.
Added some comments to ServiceStep.
Merge branch 'development' of https://github.com/hesselmeulenbeld/HUniversal-Production-Utrecht into development

Conflicts:
	src/java/rexos/mas/equiplet_agent/EquipletAgent.java
	src/java/rexos/mas/hardware_agent/DeltaRobotModule.java
	src/java/rexos/mas/hardware_agent/EquipletStep.java
	src/java/rexos/mas/hardware_agent/GripperModule.java
Merge branch 'development' of https://github.com/hesselmeulenbeld/HUniversal-Production-Utrecht into development

Conflicts:
	src/java/rexos/mas/service_agent/behaviours/GetPartsInfoResponse.java
solved some merge errors.