Public client queue and auto test client

Allow anyone, or restricted users to add slaves and have them auto-tested to ensure they are setup correctly.

What that will entail is having a patch that will force a return of every error code, exact ones like "Failed to checkout CVS...". Once a server is confirmed then an admin can activate it.

This will greatly enhance the process of adding slaves. Possibly later mechanism for removing slaves once people no longer won't there boxed used for testing. Maybe a "Manage slaves" page for slave owners.