Improve the example comprehensiveness

Author: jason-wolfe

examples/buttons.js

@@ -0,0 +1,34 @@
+/** @jsx React.DOM */
+
+var transformers = require('../');
+var React = require('react');
+
+var PrintX = React.createClass({
+  render: function() {
+    return <div>{this.props.x}</div>;
+  }
+});
+
+var App = React.createClass({
+  getInitialState: function() {
+    return {on: 0};
+  },
+  turnOn: function() {
+    this.setState({on:1});
+  },
+  turnOff: function() {
+    this.setState({on:0});
+  },
+  render: function() {
+    var SmoothPrintX = transformers.inertial(PrintX, {x:'number'}, 1000);
+    return (
+      <div>
+        <SmoothPrintX x={this.state.on ? 100 : 0}/>
+        <button onClick={this.turnOn}>On</button>
+        <button onClick={this.turnOff}>Off</button>
+      </div>
+    );
+  }
+});
+
+React.renderComponent(<App/>, document.getElementById('buttons'));