Template for starting a new resource grammar (#441)

Also addressing this https://github.com/GrammaticalFramework/gf-rgl/issues/238 with a README that adds a suggested implementation order.

src/TEMPLATE/IdiomTMP.gf

@@ -0,0 +1,56 @@
+
+--1 Idiom: Idiomatic Expressions
+
+concrete IdiomTMP of Idiom = CatTMP ** open Prelude, ResTMP, VerbTMP, QuestionTMP, NounTMP, StructuralTMP in {
+
+-- This module defines constructions that are formed in fixed ways,
+-- often different even in closely related languages.
+
+{-
+   lin
+
+
+     -- ImpersCl : VP -> Cl ;        -- it is hot
+     ImpersCl vp = {
+       } ;
+
+      -- : NP -> Cl ;        -- there is a house
+      ExistNP np =
+
+      -- ExistIP   : IP -> QCl ;       -- which houses are there
+      ExistIP ip =
+
+    -- GenericCl : VP -> Cl ;        -- one sleeps
+    GenericCl vp =
+
+    CleftNP   : NP  -> RS -> Cl ; -- it is I who did it
+    CleftAdv  : Adv -> S  -> Cl ; -- it is here she slept
+
+  -- : NP -> Cl ;        -- there is a house
+  ExistNP np =
+
+  ExistIP   : IP -> QCl ;       -- which houses are there
+
+-- 7/12/2012 generalizations of these
+
+    ExistNPAdv : NP -> Adv -> Cl ;    -- there is a house in Paris
+    ExistIPAdv : IP -> Adv -> QCl ;   -- which houses are there in Paris
+
+  -- : VP -> VP ;
+  ProgrVP vp = vp ** {
+    } ;
+
+
+  -- : VP -> Utt ;       -- let's go
+  ImpPl1 vp = { } ;
+
+  ImpP3     : NP -> VP -> Utt ; -- let John walk
+
+-- 3/12/2013 non-reflexive uses of "self"
+
+    SelfAdvVP : VP -> VP ;        -- is at home himself
+    SelfAdVVP : VP -> VP ;        -- is himself at home
+    SelfNP    : NP -> NP ;        -- the president himself (is at home)
+-}
+
+}