Record filenames (gdiff, 52e4e48)

Created 9/21/2007, updated 3/5/2024

snippets

Updates to WOFile and WODiffMachine to record filenames during scanning. At this point the WOFile class is basically complete as all it has to do is track filenames and changes.

Signed-off-by: Greg Hurrell <greg@hurrell.net>