rover example working

MetaVoxel_Tutorial.ipynb

demos/indexRover.html

demos/indexTutorialGraph.html

demos/indexTutorialPreview.html

json/rover/0.json

json/rover/1.json

json/rover/10.json

json/rover/100.json

json/rover/101.json

json/rover/102.json

json/rover/103.json

json/rover/104.json

json/rover/105.json

json/rover/106.json

json/rover/107.json

json/rover/108.json

json/rover/109.json

json/rover/11.json

json/rover/110.json

json/rover/111.json