This should fix the weird freezes and crashes while
installing. The ProgressWindow is now in its own thread
and updates the values fast again.
*Added Speed to InstallProgressWindow
Lets see who got the fastest WiiDiskDrive :P (i got up to 5.8MB/s)
*Changed the Updater source in some ways and added an own thread for it for later AutoUpdate feature (when gamestarting problem after networkinit is fixed)