Auto-update mechanism

[Shackless]

The client already checks if there is an updated version available. It would be great if it could also self-update itself after a prompt.

[Shackless]

We will solve this with our new client in Beta2 which bundles the core. So if there are updates, the client has to auto-update and include the new core version (if available). They'll always go hand-in-hand. The core itself does not and should not auto-update itself (for people that may be building extensions, use other clients etc.)