RG and Phrasebook fixes

- added a paradigm for alternative plurals
- fixed usage of alternative plurals in Numerals
- added a distinction between numerals and posessive pronouns
- verb omission and appropriate cases in some uses of to be/to have 
- fixed declination of personal names
- added a gender parameter to pronouns (similar to Polish RG)
- vowel insertion before short adjective suffix
- don't generate short forms for relative adjectives (might need lexicon update)
- minor Phrasebook fixes

lib/src/abstract/Structural.gf

@@ -122,8 +122,6 @@ abstract Structural = Cat ** {
   as_CAdv : CAdv ;
 
   have_V2 : V2 ;
-  have_V3 : V3 ;
-  have_not_V3 : V3; 
 
   fun language_title_Utt : Utt ;