BFS and ISO 9660 progress

Howdy,

I'm finished with the BFS fs module, and I've started on the ISO 9660 
(?) CD session module. I'll wait for you to check in the partscan 
stuff under its new name before checking anything in, though.

I'm flying to California tomorrow (Sat.), so may not have a whole lot 
of time to work until Sunday, other than browsing through the ISO 
9660 docs. Do you mind not having a session module until Sunday or 
later, depending on how long it takes me? If you do mind, feel free 
to take it over and I can work on a FAT module or something else.

Here is a link to the ISO 9660 docs I'm using, which are supposed to 
be equivalent to the standard:

http://www.ecma.ch/ecma1/stand/ecma-119.htm

-Tyler