(Pes) Remove redundant parameters in V*, VP and Cl

Keep VerbForm at VP level, and rename VPHTense to use Tense and 
Anteriority instead of custom names that are then mapped to Tense and 
Anteriority in Use*Cl functions.

WIP: Remove Aux type and use beVerb instead of beAux. There were a lot 
of comments along the lines "check the right form"; will do that with a 
native speaker.

src/persian/VerbPes.gf

@@ -32,7 +32,7 @@ concrete VerbPes of Verb = CatPes ** open ResPes,Prelude in {
        in complSlash vvVPS np ** {c2 = vps.c2} ;
 
 
-    UseComp comp = insertComp comp.s (predAux auxBe) ;
+    UseComp comp = insertComp comp.s (predV beVerb) ;
 
     AdvVP vp adv = insertAdV adv.s vp ;