Sector System Beta Update

[p]This update adds the following...[/p]

1. [p]Sling loading system should no longer allow you to attach more than 1 cargo container[/p]
2. [p]Sling loading system should more reliably choose the closest container[/p]
3. [p]Chinook now starts with its parking brake engaged and correctly displayed on the HUD[/p]
4. [p]Separated the HUD and Command Menu so you still access the Command Menu with the HUD turned off.[/p]