xsd-fu: Improve package/namespace support
merge develop -D org -I include -E exclude: PR 528 (Tile performance improvements for VMS and NDPI)
merge develop -D org -I include -E exclude: PR 796 (Zip: improve reader and handle performance)
merge develop -D org -I include -E exclude: PR 804 (Leica LIF: 'C' goes before other dimensions if SizeC and SizeT > 1)
merge develop -D org -I include -E exclude: PR 807 (CellWorx: ignore thumbnails and missing channel names (rebased onto develop))
merge develop -D org -I include -E exclude: PR 810 (Preserve lookup tables when exporting from ImageJ)
merge develop -D org -I include -E exclude: PR 817 (xsd-fu: Split fu.py into separate modules)
merge develop -D org -I include -E exclude: PR 818 (Last round of fixes for Maven build system)
merge develop -D org -I include -E exclude: PR 819 (Flex: map server-mapped files to the same directory as metadata files)
merge develop -D org -I include -E exclude: PR 822 (ND2: prevent alpha component from being set to 0)
merge develop -D org -I include -E exclude: PR 823 (Zeiss CZI: adjust for incorrectly recorded extra dimensions)