Specify directory to walk

[bdietz]

Currently, the user's current working directory needs to the be the target of what's to be walked. I think it would be useful if the user could provide a target directory instead, such as

walk_to_dfxml -t /path/to/directory -o /path/to/report.xml

Thanks for considering it.

[ajnelson-nist]

Thanks for the feature request! I'll try to implement and test soon, currently mid-stream on another project.