updated readme.md

Author: bohdanbirdie

.idea/workspace.xml

@@ -3,12 +3,17 @@
 React components to view STL and OBJ models.
 Based on THREE.js and [react-stl-viewer](https://github.com/chiedolabs/react-stl-viewer)
 
+### [Live Demo](https://bohdanbirdie.github.io/stl-obj-demo/).
 
 ## How to use
-1. Use OBJ or STL loader
+1. Install the app
+    - via npm ```npm install react-stl-obj-viewer --save```
+    - via yarn ```yarn add react-stl-obj-viewer```
+
+2. Use OBJ or STL loader
 
     ```import {OBJViewer, STLViewer} from 'npm-react-component-starter';```
-2. Pass props to viewers:
+3. Pass props to viewers:
 
 ```
 static propTypes = {
@@ -20,6 +25,8 @@ static propTypes = {
         height: PropTypes.number,    // Height of rendered area
         backgroundColor: PropTypes.string, // Scene background color 
         modelColor: PropTypes.string,// Model color(textures unsupported)
+        sceneClassName: PropTypes.string, // Class name for rendered canvas scene
+        onSceneRendered: PropTypes.func,  // Callback for rendered scene ready
     };
 ```
 Default props
@@ -29,12 +36,11 @@ static defaultProps = {
         modelColor: '#B92C2C',
         height: 400,
         width: 400,
+        sceneClassName: '',
     };
 ```
 
 ## Convert scene to screenshot
 
 Simply get your element _(canvas scene)_ by any selector and call `.toDataURL("image/png")` on it.
 ___
-
-## [Live Demo](https://bohdanbirdie.github.io/stl-obj-demo/).