These directories are in the wwwofflebook/library:

bookmarkfiles: 
Examples for those who are interested in developing a new bookmark extraction 
function or contribute anything else to the wwwofflebook scripts.
You don't need to copy it anywhere, and if you think you don't need it 
you can delete it.

wwwoffle_export:
A tool to export the wwwoffle cache to an 'alien' Linux system, for example 
from redhat to debian. It provides a menu based way to adapt ownership and 
file permissions.

packup_wwwofflebook:
The script that i use to copy the wwwofflebook files to this location, 
and create a tarball (tar.bz2) that can be shipped away.
You can use it if you like to send away a modified version. 
It's configured in the script header.