In mono waiting for a Console.Readline generates a 99% of cpu

When executing the self-host in mono waiting for the Console.ReadLine make the cpu to go to 100% the same as this http://www.tasharen.com/forum/index.php?topic=6172.0.

So instead of waiting for an input, we make the thread to sleep forever whenever you launch the application with the parameter -d

```
> mono bin/Klondike.SelfHost.exe -d
```