NewFeatures.md

@@ -56,6 +56,8 @@ Dynare 4.6-unstable
 
  - The Macro processor has been rewritten
    - New features
+     - `elseif`-clauses are now supported
+     - a `defined()`-function allows testing whether macro variables have been defined
      - Empty arrays (with the `[]` syntax) are now possible (#707)
      - Arrays of arrays are now possible
      - New types: Double, Tuple, Function