WMF product development process/Concept

Our software should be:
 * inclusive : to well meaning people (sharing in the goals of the project)
 * credible : of quality and trustworthiness (towards fulfilling the goals of the project)
 * egoless : fair, altruistic, selfless, self-rewarding (in the process of the project)

Also: https://phabricator.wikimedia.org/T126952