restored mathematical in 1.4; forgave some lock fields in overload resolution

lib/resource-1.4/mathematical/MathematicalNor.gf

@@ -0,0 +1,27 @@
+--# -path=.:present:prelude
+
+concrete MathematicalNor of Mathematical = 
+  NounNor - [ComplN2], --- to avoid ambiguity 
+--  VerbNor, 
+  AdjectiveNor,
+  AdverbNor,
+  NumeralNor,
+--  SentenceNor,
+  QuestionNor,
+  RelativeNor,
+  ConjunctionNor,
+  PhraseNor,
+  TextX,
+  IdiomNor,
+
+  StructuralNor,
+
+  SymbolNor,
+  PredicationNor,
+
+  LexiconNor
+  ** {
+
+flags startcat = Phr ;
+
+} ;