Solver manager

Because of #142 (closed) I can't write a proper markdown-based description thus I upload a screenshort ...

• remove former StateBlock notification list
• StateBlock::getState returns by copy
• remove StateBlock::getPtr

src/processor_base.h

@@ -40,6 +40,9 @@ class ProcessorBase : public NodeBase, public std::enable_shared_from_this<Proce
         static unsigned int processor_id_count_;
 
     public:
+
+        using mutex_t = std::recursive_timed_mutex;
+
         ProcessorBase(const std::string& _type, const Scalar& _time_tolerance = 0);
         virtual ~ProcessorBase();
         void remove();
@@ -92,6 +95,8 @@ class ProcessorBase : public NodeBase, public std::enable_shared_from_this<Proce
     protected:
         unsigned int processor_id_;
         Scalar time_tolerance_;         ///< self time tolerance for adding a capture into a frame
+
+        mutex_t mut_;
 };
 
 }