minor Estonian additions from last summer (#51)

* add two new nominal modifiers of type NP -> CN -> CN

* change married_A2 to invariant adjective

* rename CommonNoun to Noun

* change type of relPron

* merge CompAP and ICompAP using the same oper ; fix reflPron (ise, enda, ...) and add a helper function fixPlNom

* minor cleanup

* change in who_RP, reflecting the change of relative pronouns in ResEst

* Add new functions to ExtendEst ; update comments in ResEst

src/translator/ExtensionsEst.gf

@@ -152,7 +152,7 @@ lin
     {s = \\agr => infVPAnt ant.a (NPCase Nom) pol.p agr vp InfDa } ;
 
   -- TODO: revisit pronouns? Looks a bit overly complicated. /IL
-  who_RP = { s = \\n,c => MorphoEst.kesPron ! n ! npform2case n c ; 
+  who_RP = { s = \\n,c => MorphoEst.kesPron ! NCase n (npform2case n c) ; 
              a = RNoAg } ;
 
   that_RP = which_RP ;