scripts: add squad-config script for managing external config
scripts: add squad-config script for managing external config

squad-config script is meant to create and update SQUAD objects using
REST API. The configuration can be stored in version control. The idea
for the whole setup is to make configuration changes easier and have
ability to track them.

The script can manage the following objects:
 - Groups
 - User Groups
 - Projects
 - Email templates
 - CI backends

Initial configuration can be dumped from live SQUAD instance.

Signed-off-by: Milosz Wasilewski <a39812e55748be210556797addcf4c064734f1bf@linaro.org>

terceiro/squad,terceiro/squad,terceiro/squad,terceiro/squad