Merge pull request #573 from melissalinkert/bfopen-metadata

bfopen: save individual series' original metadata
Merge pull request #572 from melissalinkert/2013-06-schema-links

2013-06 schema links
Reduce the number of JAI ImageIO registrations

Fixes ticket #11034.
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 574 (xsd-fu: Generalise language type mapping)
merge develop -D org -I include -E exclude: PR 578 (xsd-fu: Generalise language type mapping (2))
merge develop -D org -I include -E exclude: PR 583 (Reduce the number of JAI ImageIO registrations)