FOP-2213 use kern table when no GPOS kern lookups are present
FOP-2094 preliminary support for mapping OTF script tags from @script property
FOP-2094 when no lookups match specified or auto script, retry using DFLT script
FOP-2093 preliminary support for mapping OTF language tags from @language property



git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1623885 13f79535-47bb-0310-9956-ffa450edef68