Add ipywidgets examples

.gitignore

.ipynb_checkpoints/ipywidgets-checkpoint.ipynb

.ipynb_checkpoints/voila-basic-checkpoint.ipynb

.ipynb_checkpoints/voila-dashboard-checkpoint.ipynb

.ipynb_checkpoints/voila-gridstack-checkpoint.ipynb

.ipynb_checkpoints/voila-ipyvolume-checkpoint.ipynb

.ipynb_checkpoints/vuetify-bqplot-checkpoint.ipynb

.ipynb_checkpoints/vuetify-custom-checkpoint.ipynb

dashboards/voila-basic.ipynb

dashboards/voila-dashboard.ipynb

dashboards/voila-ipyvolume.ipynb

dashboards/vuetify-bqplot.ipynb

dashboards/vuetify-custom.ipynb

docker/Dockerfile

docker/extensions/vtk-remoterender/MANIFEST.in

docker/extensions/vtk-remoterender/js/lib/embed.js

docker/extensions/vtk-remoterender/js/lib/extension.js

docker/extensions/vtk-remoterender/js/lib/index.js

docker/extensions/vtk-remoterender/js/lib/labplugin.js

docker/extensions/vtk-remoterender/js/lib/remoterender.js