Changes

Including Because of an actual bug, including figures in a document processed by XeTeX requires some cautions. The use of the usual <cmd>externalfigure</cmd> can slow a lot the processing and raise some troubles. A safe possible strategy (which works only as a workaround as it breaks engine compatibility) is to replace <cmd>externalfigure</cmd> with the low-level XeTeX specific command <cmd>XeTeXpicfile</cmd>. For pdf inclusion one can use <cmd>XeTeXpdffile</cmd>.