remove VTK version check
Compilable for Mac

	modified:   CMakeLists.txt
	modified:   VTK/compareStreamline.cpp
	modified:   VTK/examples/CMakeLists.txt
	modified:   VTK/examples/StreamlineRenderPlot3D.cpp
	modified:   renderer/examples/CMakeLists.txt
	modified:   src/CMakeLists.txt
	modified:   user_defs.mk