Merge remote-tracking branch 'origin/vgl_testing'

* origin/vgl_testing:
  Added pick test
  Fixed coding style of tests
  Added first vgl test
  Fixed the implementation of setVisible for group node
Fixed invalid check for vgl deploy directory
Merge remote-tracking branch 'origin/bug#8_fix_vgl_cmake' into next

* origin/bug#8_fix_vgl_cmake:
  Fixed invalid check for vgl deploy directory