WORK in PROGRESS: catalogtree

This is only to discuss:

There is a basic example in /ltmom/app/src/catalogtree/example/catalogtree.html

- Expandable/collapsible branches
- Configured with a json file (the equivalent service has to be merged  mf-chsdi3/pull/13)
- Opened/closed branch as defined
- I am not very happy with my template, but I don't have better idea for now.