restored multimodal and mathematical sources

lib/resource-1.0/multimodal/MultimodalFin.gf

@@ -0,0 +1,18 @@
+--# -path=.:present:prelude
+
+concrete MultimodalFin of Multimodal =
+  NounFin,
+--  Verb, 
+  AdjectiveFin,
+  AdverbFin,
+  NumeralFin,
+--  Sentence, 
+--  Question,
+--  Relative,
+--  Conjunction,
+--  Phrase,
+--  Tensed,
+  StructuralFin,
+  DemonstrativeFin,
+  LexiconFin
+  ** {} ;