Added LANGUAGE_IT initial data type

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/FOP_0-20-0_Alt-Design@197665 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/fop/fo/properties/Property.java

                        ,NONE_IT = 16384
                       ,AURAL_IT = 32768
             ,TEXT_DECORATION_IT = 65536
-  // Unused         ,FONTSET_IT = 131072
+                   ,LANGUAGE_IT = 131072
                                 ;
 
     /**
                                   | NCNAME_IT
                                   | COLOR_IT
                                   | COUNTRY_IT
+                                  | LANGUAGE_IT
                                   | URI_SPECIFICATION_IT
                                   | BOOL_IT
                                   | ENUM_IT