Support custom file operations during ISO extraction

[pbatard]

This could go something like this:

• User would create a text file with the same name as the ISO but with a specific extension. For instance, if you use en_windows_8_1_x64_dvd_2707217.iso you would create a en_windows_8_1_x64_dvd_2707217.ruf or something in the same directory
• The .ruf file would contain simple commands like:

d /sources/cversion.ini
r /sources/boot.wim C:/mydir/myboot.wim
i C:/mydir/EI.cfg /sources/EI.cfg

to delete, replace or insert a file onto the target USB during ISO extraction.

[Hlsgs]

@pbatard is this still planned for a future release?

[pbatard]

If it's still opened it's still planned. However, because it's such low priority (too few people will benefit from that compared to other features that I have still lined up) that it'll probably years before I get around to look into it.

[Hlsgs]

K, good to know. Thank you for your excellent work!