docs(README): add docs about transcluded sorting

Author: thgreasi

README.md

@@ -208,6 +208,30 @@ list A: stop
 
 For more details about the events check the [jQueryUI API documentation](http://api.jqueryui.com/sortable/).
 
+## Integrating with directives doing transclusion
+Wrap the transclusion directive element with the ui-sortable directive and set the `items` to target your `ng-repeat`ed elements. Following best practices, it is also highly recommended that you add a `track by` expression to your `ng-repeat`. [Angular Meterial example](http://codepen.io/thgreasi/pen/NbyLVK).
+
+```js
+myAppModule.controller('MyController', function($scope) {
+  $scope.items = ["One", "Two", "Three"];
+
+  $scope.sortableOptions = {
+    items: '.sortable-item'
+    // It is suggested to use the most specific cssselector you can,
+    // after analyzing the DOM elements generated by the transclusion directive
+    // eg: items: '> .transclusionLvl1 > .transclusionLvl2 > .sortable-item'
+  };
+});
+```
+
+```html
+<div ui-sortable="sortableOptions" ng-model="items">
+  <a-transclusion-directive>
+    <div ng-repeat="item in items" class="sortable-item">{{ item }}</div>
+  </a-transclusion-directive>
+</div>
+```
+
 ## Examples
 
 - [Simple Demo](http://codepen.io/thgreasi/pen/wzmvgw)
@@ -233,6 +257,7 @@ For more details about the events check the [jQueryUI API documentation](http://
 ## Integrations
 - [firebase](http://codepen.io/thgreasi/pen/repEZg?editors=0010)
 - [ui.bootstrap.accordion](http://plnkr.co/edit/TGIeeEbbvJwpJ3WRqo2z?p=preview)
+- [Angular Meterial](http://codepen.io/thgreasi/pen/NbyLVK) (thanks yenoh2)
 - [Asynchronous loading jQuery+jQueryUI with crisbeto/angular-ui-sortable-loader](https://github.com/crisbeto/angular-ui-sortable-loader)
 
 ## Reporting Issues