make sure that thumbnails are not empty (should fix crash 35806)
vs 2013 compilation fix
another vs 2013 compilation fix
vs 2013 compilation fix in openjpeg
vs 2013 compilation fix in mupdf
rewrite IsVistaOrGreator() to not use deprecated GetVersion() and remove now unused GetWindowVersion()
epub: accept application/html+xml as a valid media type for content (fixes issue 2452)
update /ext/_patches
EPUB: also load images which aren't in the manifest (and with bad path separators)