change the names in the ast to be lists so can support qualified names

everywhere:
  TRSimple: replaces the TRQualified
  Iden
  App name
  AggregateApp name
  WindowApp name
  operator names (not sure if this is used in ansi sql)
  explicit table
  function in from clause

tools/Language/SQL/SimpleSQL/TableRefs.lhs

@@ -21,7 +21,7 @@ expression
 >      ,ms [TRSimple "t", TRSimple "u"])
 
 >     ,("select a from s.t"
->      ,ms [TRQualified "s" "t"])
+>      ,ms [TRSimple ["s","t"]])
 
 these lateral queries make no sense but the syntax is valid