Fix 501: Always load the loop module so losetup can access the img file
Created by: BrianOtto
This has been tested and confirmed working in a clean install, that was created after a reboot. Please see #501 (closed) for how I was testing things. FYI, the loop module had to be loaded before the pmb.helpers.mount.bind_blockdevice
in init()
for this solution to work.