Changes since last session

Whenever a new session starts, display the list of websites, with the following alterations (to show the changes since last session):

The feature is implemented as of 2010.08.30 and bugs related to it were fixed: bug #623446 - 'List of websites - Changes since last session' is not visible enough - https://bugs.launchpad.net/hackit/+bug/623446
 * In addition to the current list of websites, also show the websites that the players used to own after its last action during the previous session
 * Show those websites in red, and add "(Stolen!) " before the URL
 * Branches/nodes need to be developped to show all the stolen websites, but not more than needed