Add note about new modules API to README.

Author: chriskrycho

README.md

@@ -1,8 +1,6 @@
 # ember-cli-typescript
 
-[![*nix build status](https://travis-ci.org/emberwatch/ember-cli-typescript.svg?branch=master)](https://travis-ci.org/emberwatch/ember-cli-typescript)
-[![Windows build status](https://ci.appveyor.com/api/projects/status/pjilqv1xo3o9auon/branch/master?svg=true)](https://ci.appveyor.com/project/chriskrycho/ember-cli-typescript/branch/master)
-[![Ember Observer Score](https://emberobserver.com/badges/ember-cli-typescript.svg)](https://emberobserver.com/addons/ember-cli-typescript)
+[![*nix build status](https://travis-ci.org/emberwatch/ember-cli-typescript.svg?branch=master)](https://travis-ci.org/emberwatch/ember-cli-typescript) [![Windows build status](https://ci.appveyor.com/api/projects/status/pjilqv1xo3o9auon/branch/master?svg=true)](https://ci.appveyor.com/project/chriskrycho/ember-cli-typescript/branch/master) [![Ember Observer Score](https://emberobserver.com/badges/ember-cli-typescript.svg)](https://emberobserver.com/addons/ember-cli-typescript)
 
 Use TypeScript in your Ember 2.x apps!
 
@@ -115,6 +113,12 @@ give users fair warning about the increased size. To enable TypeScript for your
 addon, simple move `ember-cli-typescript` from `devDependencies` to
 `dependencies` in your `package.json`.
 
+## New modules API
+
+Note: the new modules API is not yet supported by the official typings (which
+are distinct from this addon, though we install them). We hope to have support
+for them shortly!
+
 ## Not (yet) supported
 
 While TS already works nicely for many things in Ember, there are a number of