* clean up the wild mounts and unmounts (this and the new libfat fix the download-bug)
* reorganize shutdowns and reboots use now the functions Sys_Reboot(), Sys_Shutdown(), Sys_ShutdownToIdel(), Sys_ShutdownToStandby() and Sys_BackToLoader()
this functions stops the GUI-Thread, Shutdowns the Audio, Video, WPad and unmounts the SD and USB