* include/dynamic-graph/command.h,
    * include/dynamic-graph/value.h
    * src/command/command.cpp,
    * src/command/value.cpp.

	  * include/CMakeLists.txt,
	  * include/dynamic-graph/command.h: new,
	* include/dynamic-graph/entity.h,
	* include/dynamic-graph/parameter.h: new,
	* include/dynamic-graph/value.h: new,
	* src/command/command.cpp: new,
	* src/command/value.cpp: new,
	* src/dgraph/entity.cpp.