Add support of vtkResourceStream in vtkPLYReader
This is the first vtkResourceStream and vtkResourceParser usage example I have made, it does not contains too many changes.
This changes make vtkPLYReader between 3 to 4 times faster when reading text-based PLY files. For example, the test data, bunny.ply, took ~78ms to get decoded using the old implementation vs ~24ms now.
Edited by Alexy Pellegrini