Add Handbook
Adds the OpenCraft handbook, as a separate document, and populate it using the pages moved from the onboarding course and the internal documentation:
http://opencraft.com/doc/handbook/
See detailed description, other related PRs and the recommended order to review these on the main forum post: https://forum.opencraft.com/t/opencraft-v3-scaling-up-some-self-management/141
Edited by Xavier Antoviaque