Maltese: new reduced verb implementation, using binding for pronominal suffixes

Also include some syntax stuff adapted from Angelo Zammit's dissertation.
These sections in the code are marked with [AZ]

The old verbs implementation can still be found at this point in the GitHub repo:
7b3f4a049d

lib/src/maltese/SymbolMlt.gf

@@ -2,7 +2,7 @@
 -- John J. Camilleri, 2012
 -- Licensed under LGPL
 
---# -path=.:abstract:common
+--# -path=.:../abstract:../common
 
 concrete SymbolMlt of Symbol = CatMlt ** open Prelude, ResMlt in {