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 583 (Reduce the number of JAI ImageIO registrations)
merge develop -D org -I include -E exclude: PR 589 (Zeiss LSM: use the longer display channel name)
merge develop -D org -I include -E exclude: PR 590 (xsd-fu: Generalise language type mapping (3))
merge develop -D org -I include -E exclude: PR 596 (Minor defensive programming changes for TIFF-based formats)
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