Makes the scripts work when wget is not available (macos)
Mac OS X does not have fusermount and uses umount instead. The fuse-unmount.bash calls the appropriate command.
Mounts two gocryptfs filesystems, "ping" and "pong" and moves the linux-3.0 kernel tree back and forth between them. When called as "pingpong-rsync.bash" it uses "rsync --remove-source-files" for moving the files, otherwise plain "mv".