xbmc: show all removable disks mounted under media

this fixes external usb drives with fs label set
not showing up in xbmc after the switch to udevil
xbmc: fix 'remove safely' with udevil
new package: 'libdvbcsa'
vdr-plugin-dvbapi: switch to libdvbcsa

closes #2554
vdr-addon: bump
xbmc: UDevProvider: mountpoint should contain "/media/"

/ (dev/loop0) is considered "removable" but
should not be shown as (empty) media source
bump unofficial
xbmc: use udevil to umount. escape mountpath