Add option to keep Tor open even after browser is closed

I've found it annoying that if the browser crashes or I close it automatically, the Vidalia control panel and the tor processes will close as well. Also, I sometimes just want to run Tor without the browser (Just as a relay), and I can't run it without having to keep the browser open.

So maybe there could be an option to not close everything if the browser is closed? 

Trac:
Username: Frogging101