Added ExtendGer as almost dummy to start with

src/german/AllGer.gf

@@ -3,5 +3,8 @@
 concrete AllGer of AllGerAbs = 
   LangGer,
   IrregGer,
+----  ExtendGer, ---- to replace ExtraGer
   ExtraGer
-  ** {} ;
+  **
+  open ExtendGer in ---- to force compilation
+    {} ;

src/german/AllGerAbs.gf

@@ -3,5 +3,6 @@
 abstract AllGerAbs = 
   Lang,
   IrregGerAbs,
+----  Extend,
   ExtraGerAbs
   ** {} ;

src/german/ExtendGer.gf

@@ -0,0 +1,19 @@
+--# -path=alltenses:../common:../abstract
+
+concrete ExtendGer of Extend =
+  CatGer ** ExtendFunctor
+   - [InOrderToVP]
+  with
+    (Grammar = GrammarGer) **
+  open
+    GrammarGer,
+    ResGer,
+    Coordination,
+    Prelude,
+    ParadigmsGer in {
+
+lin
+
+  InOrderToVP vp = {s = "um" ++ useInfVP False vp} ;
+  
+}