As it turns out the thing I marked as "header size" is more likely just a discarded revision.
Anyways, to detail this: pak version 5 adds fields to the header for sector alignment. The reader now handles this and reads the sectoralignment TOC entry, which now allows STREAMS (and any other packages with this set?) to extract properly.
Woohoo.
PakReader won't read everything in ReadData(), it now only reads the header and TOC.
Files now need to be read in separately.
Adds progress bar to europa_pack_extractor.
Moved code around.
