Add libraries, config and documentation for PostgreSQL

changed milestone to %1.0-alpha2 — Precise Pheasant

Move to 1.0 as we decided with @jackie that all Docker containers will be shipped with PostgreSQL dependencies, rather than MySQL/MariaDB.

added P2 label

added To Do label

assigned to @david

changed milestone to %Aura 0.9

added Doing label and removed To Do label

closed

removed Doing label

mentioned in commit 85944b2e