change recomendation of how to use dd to include 'bs=1m' so that imaging a 4GB card will only take 10 minutes, instead of 6 hours.
change recomendation of how to use dd to include 'bs=1m' so that imaging a 4GB card will only take 10 minutes, instead of 6 hours.

teverett/crochet-freebsd,wheelcomplex/crochet-freebsd,dankm/crochet-freebsd,dankm/crochet-freebsd,MattDooner/crochet-freebsd,rm4rty/crochet-freebsd,brd/crochet,HardenedBSD/crochet,MattDooner/crochet-freebsd,rm4rty/crochet-freebsd,brd/crochet,brd/crochet,teverett/crochet-freebsd,freebsd/crochet,HardenedBSD/crochet,wheelcomplex/crochet-freebsd,wheelcomplex/crochet-freebsd,freebsd/crochet