Build list of teams from YAML file

Render the YAML file contents as the list of official teams.

Change-Id: I7c6effe6e440f2147f8c68df090152e716c38fba
Add definition of the Integrated Release

Remove the incubation and integration process and policies as a separate
file, replacing it with a single list of policies that integrated projects
are expected to follow.

Provide an explicit description of the new Integrated Release, based on
co-dependent gating and trust rules.

Change-Id: Ie2bba43dfd7faddab7afe6b3c54261fd2c0463ed