nullterminated - 2013-11-28

Just wanted to report that I needed to modify the boot script to use ext4
as an argument of mount in order to get it to work. It was using ext2,
which won't work with the ext4 images. I also noticed on line 38 the
terminal complains of no dirname command found. Seems that probably should
be $bbox dirname, but I haven't tried that yet. I also need to determine
why three umounts fail on exit. Otherwise, seems to be working pretty well
on a Nexus 5.