WIP: Resolve "Processor constructors and creators requiring a sensor pointer?"

Closes #248 (closed)

include/core/processor/processor_base.h

@@ -329,7 +329,7 @@ class ProcessorBase : public NodeBase, public std::enable_shared_from_this<Proce
         void setSensor(SensorBasePtr _sen_ptr){sensor_ptr_ = _sen_ptr;}
 
     public:
-        virtual bool isMotion();
+        virtual bool isMotion() const;
 
         void setTimeTolerance(Scalar _time_tolerance);
 
@@ -380,7 +380,7 @@ std::shared_ptr<classType> ProcessorBase::emplace(SensorBasePtr _sen_ptr, T&&...
     return prc;
 }
 
-inline bool ProcessorBase::isMotion()
+inline bool ProcessorBase::isMotion() const
 {
     return false;
 }