library/roles/gitblit: More gitblit configuration setup.
library/roles/postgresql/tasks/manage_pg_db.yml: disable the task that manages extensions. The conditional cannot work.
library/roles/postgresql: Ansible 2 compatibility.
library/roles/postgresql/tasks/manage_pg_db.yml: Add a task that activates extensions on the databases.
../library/roles/nginx: Ignore errors when starting the service for the first time.
../library/roles/postgresql/tasks/manage_pg_db.yml: New 'createdb' variable is used to setup more than one user for the same database.