Change the xml export part of the modpack to be a copy/file manipulation step

[Willster419]

The original idea was to extract xml files from WoT itself (either in a directory, or inside one of the packages), decompress them form xml binary, and copy them to a destination inside res_mods.

However it was brought to my attention (cough @Arkhorse) that it can be modifed to be a file copy system, and additional features after copy like xml decompress.

It's a solid idea. We'll need to think how to maintain old compatibility