saving is boot0. If it is, use its version number so that we can grab all of boot0 (1024 bytes with version 1.1 for example) when we save it to a file via the 'f' option. Otherwise, we just save the first sector. - Cleanup this code a bit by splitting some functionality out into separate functions. Suggested by: Patrick Bihan-Faou <patrick@mindstep.com> (1)