added more routines for plotting VTK surfaces
added more routines for plotting VTK surfaces

git-svn-id: 73c5e9be61741f0643e0befefbf0388e40c6b5c0@356 33a3f72e-afca-4cba-af91-dee07167dc2f

OpenFAST/OpenFAST,OpenFAST/OpenFAST,OpenFAST/OpenFAST