Util that enable us to upgrade parts of code base if needed.

- Tool that allow us to do code style linting.

- Pull inn crodas/haanga from UiB own fork.

- PSR4 autoload all classes except modules.
- Explicit declare what is used by classes.
- Composer define what PHP modules are used.

- Allow us to use namespaces
- Allow PSR 4 autoloading
- Add libraries and classes through dev. and prod. staging.