Adding waiting in queue to non-ready reservation statuses

This approach should work well for all statuses I have observed so far. However, it is vulnerable to new non-available states.

However; The Metro app uses the following logic:

```C#
return holdRequestEnd == undefined || holdRequestEnd == "" 
    ? "Klar til henting: Nei" 
    : "Klar til henting: Ja";
```

If you think I should switch to using the same logic in the Nancy service I will.