Update README

Added info about the UMD build to the Installation section of the
README. Also updated references to createStore to take advantage
of the spiffy new store enhancer style in Redux v3.1.0.

README.md

@@ -21,10 +21,18 @@ Uses [Howler.js](https://github.com/goldfire/howler.js/) under the hood, which u
 
 ## Installation
 
+### Preferred: NPM
+
 ```js
 npm i -S redux-sounds
 ```
 
+
+### Also available: UMD
+
+UMD builds are also available, for single-file usage or quick hacking in a JSbin. Simply add `dist/redux-sounds.js` or `dist/redux-sounds.min.js` to your file in a `<script>` tag. The middleware will be available under `ReduxSounds`.
+
+
 ## Setup
 
 `soundsMiddleware` works similarly to other Redux middleware, with one important exception: it needs to be pre-loaded with sound data.
@@ -60,7 +68,8 @@ const soundsData = {
 const loadedSoundsMiddleware = soundsMiddleware(soundsData);
 
 // Use as you would any other middleware.
-const store = applyMiddleware(loadedSoundsMiddleware)(createStore)(gameReducer);
+const store = createStore(gameReducer, applyMiddleware(loadedSoundsMiddleware));
+// (Using the condensed createStore released in Redux v3.1.0)
 ```
 
 Howler has much more advanced capabilities, including using sound sprites, specifying callbacks to run when the sound has completed, looping sounds, fading in/out, and much more. See [their documentation](https://github.com/goldfire/howler.js/#properties) for the complete list.
@@ -130,7 +139,7 @@ Unlike other middleware, you cannot simply pass it to Redux as-is:
 import soundsMiddleware from 'redux-sounds';
 
 // DON'T do this:
-const createStoreWithMiddleware = applyMiddleware(soundsMiddleware)(createStore);
+const store = createStore(rootReducer, applyMiddleware(soundsMiddleware));
 ```
 
 The reason for this is that before the store can be registered, you need to pass it data about which sounds it needs to handle.
@@ -144,7 +153,7 @@ import { soundsData } from '../data/sounds';
 // Important step:
 const loadedSoundsMiddleware = soundsMiddleware(soundsData);
 
-const createStoreWithMiddleware = applyMiddleware(loadedSoundsMiddleware)(createStore);
+const store = createStore(rootReducer, applyMiddleware(loadedSoundsMiddleware));
 ```
 
 ## Planned functionality