Changed testing URLs to reflect symlink name change.
Merge branch 'fix-vtkweb-tests'
Privilege drop and WebSocketPlugin now work together nicely.
Handle SIGINT, SIGTERM, and SIGQUIT better
Merge branch 'fix-sudo-crash'

Closes #158.
Renamed vtk_web_cone.py to vtkweb_cone.py.
Removing unnecessary code from cone/tree examples.
Merge branch 'vtk-web'