Update README.md (nstudio#92)

Author: rigor789

README.md

@@ -92,6 +92,25 @@ export class SomeComponent  {
 </StackLayout>
 ```
 
+### NativeScript-Vue Usage Sample
+
+In your `main.js` (The file where the root Vue instance is created) register the element
+
+```js
+Vue.registerElement('CheckBox', () => require('nativescript-checkbox').CheckBox, {
+  model: {
+    prop: 'checked',
+    event: 'checkedChange'
+  }
+})
+```
+
+And in your template, use it
+
+```html
+<CheckBox v-model="myCheckedProp" fillColor="red" text="Check me!" />
+```
+
 ## Properties
 
 - **checked** - boolean