Refactor services into classes (#183)

TactilityHeadless/Source/service/ServiceContext.h

@@ -22,10 +22,7 @@ public:
 
     /** @return a reference ot the service's manifest */
     virtual const service::ServiceManifest& getManifest() const = 0;
-    /** @return a shared pointer to the data that is attached to the service */
-    virtual std::shared_ptr<void> _Nullable getData() const = 0;
-    /** Set the data for a service. */
-    virtual void setData(std::shared_ptr<void> newData) = 0;
+
     /** Retrieve the paths that are relevant to this service */
     virtual std::unique_ptr<Paths> getPaths() const = 0;
 };