Refactor to simplify the install and add support for building 32-bit images for the RPi3.
Refactor to simplify the install and add support for building 32-bit images
for the RPi3.

teverett/crochet-freebsd,teverett/crochet-freebsd,dankm/crochet-freebsd,freebsd/crochet,freebsd/crochet,dankm/crochet-freebsd