Moved some widgert code from old scenegraph to new
Removed old scenegraph
Reorganization
- moved Widget, SubScene, cameras, and systems out of viewbox.py
- moved viewbox to widgets/
Renamed examples/scenegraph to examples/scene
Merge branch 'mouse_interaction' into scenegraph_reorganization
Merge remote-tracking branch 'vispy/scenegraph' into scenegraph_reorganization
flakify
fixed examples
better fix
Merge branch 'visual_split' into scenegraph
minor fixes
Added custom visual example
Fixed py2 error in example