add namespaces to names

playground/samples/Tour.newt

@@ -101,9 +101,7 @@ foo a b = ?
 
 -- We can define native types, if the type is left off, it defaults to U
 
-ptype Int : U
-ptype String : U
-ptype Char : U
+ptype SomePrimType : U
 
 -- The names of these three types are special, primitive numbers, strings,
 -- and characters inhabit them, respectively. We can match on primitives, but

playground/samples/TypeClass.newt

@@ -51,7 +51,7 @@ infixr 1 _,_
 data Pair : U -> U -> U where
   _,_ : ∀ A B. A -> B -> Pair A B
 
-ptype Int
+
 
 test : Maybe Int
 test = pure 10