Aegir Custom Settings

This feature is designed to improve Aegir first time user experience:

1. The front-end UI is simplified to minimize possible confusion.
2. The menu is re-organized for easy access to common tasks.
3. Most of commonly used Aegir features are enabled by default.
4. New role 'root' is added to allow optionally higher level of access for the end-user.
5. Permissions are improved for Client role so the Client can better manage his sites.

Dependencies:

1. Pressflow Drupal core (path_alias_cache module).
2. Features module.
3. Nginx based Aegir installation.