Conflicts:
	gargantext_web/api.py

[FEATURE] it is now very clear when data are being loaded

[TEST] Built a JavaScript interface to navigate through nodes as a hierarchy

[TEST] tried to do something useful with "dc.js"

Intégration des mes modifs locales

[FEATURE] Tests to create graphs optimized with SQL (thx Mathieu for your input): ok. Need to connect to explorer now.

intégration de mat avec les diff

[GIT] Added a patch for cte_tree in init/cte_tree.models.diff