Include vtkviewer.py as the default vtk surface viewer.

Written 2012-2013 Hal Canary <http://cs.unc.edu/~hal>

Author:    Hal Canary <hal@cs.unc.edu>
	new file:   utils/vtkviewer.py
Merge branch 'master' of github.com:binarybottle/mindboggle

Author: Hal Canary <hal@cs.unc.edu>