Fix error in VNH5019 example

I also noticed that this doc file was not being generated, so I added it.

README.md

@@ -173,7 +173,7 @@ To get you up and running quickly, we provide a variety of examples for using ea
 
 To interactively navigate the examples, visit the [Johnny-Five examples](http://johnny-five.io/examples/) page on the official website. If you want to link directly to the examples in this repo, you can use one of the following links.
 
-**There are presently 361 example programs with code and diagrams!**
+**There are presently 362 example programs with code and diagrams!**
 
 <!--extract-start:examples-->
 
@@ -263,6 +263,7 @@ To interactively navigate the examples, visit the [Johnny-Five examples](http://
 - [Motor - H-Bridge](https://github.com/rwaldron/johnny-five/blob/master/docs/motor-hbridge.md)
 - [Motor - LUDUS](https://github.com/rwaldron/johnny-five/blob/master/docs/motor-LUDUS.md)
 - [Motor - PCA9685](https://github.com/rwaldron/johnny-five/blob/master/docs/motor-PCA9685.md)
+- [Motor - Pololu VNH5019 Dual Motor Driver Breakout](https://github.com/rwaldron/johnny-five/blob/master/docs/motor-vnh5019.md)
 - [Motor - Sparkfun Dual H-bridge Edison Block](https://github.com/rwaldron/johnny-five/blob/master/docs/motor-sparkfun-edison-hbridge.md)
 - [Motor - Sparkfun TB6612FNG](https://github.com/rwaldron/johnny-five/blob/master/docs/motor-TB6612FNG.md)
 - [Motor - l298 Breakout](https://github.com/rwaldron/johnny-five/blob/master/docs/motor-l298-breakout.md)

docs/motor-vnh5019.md

@@ -0,0 +1,96 @@
+<!--remove-start-->
+
+# Motor - Pololu VNH5019 Dual Motor Driver Breakout
+
+<!--remove-end-->
+
+
+
+
+
+
+
+
+Run this example from the command line with:
+```bash
+node eg/motor-vnh5019.js
+```
+
+
+```javascript
+const {Board, Motor} = require("johnny-five");
+const board = new Board();
+
+board.on("ready", () => {
+
+  // You can configure with explicit pins settings
+  const m1 = new Motor({
+    pins: {
+      pwm: 9,
+      dir: 2,
+      cdir: 4,
+      enable: 6
+    }
+  });
+
+  // Or you can configure using the built in configs
+  const m2 = new Motor(Motor.SHIELD_CONFIGS.POLOLU_VNH5019_SHIELD.M2);
+
+  // Inject the `motor` hardware into
+  // the Repl instance's context;
+  // allows direct command line access
+  board.repl.inject({
+    m1,
+    m2
+  });
+
+  // "start" events fire when the motor is started.
+  [m1, m2].forEach((motor, index) => {
+    motor.on("start", () => {
+      console.log(`start motor ${index+1}`);
+
+      // Demonstrate motor stop in 2 seconds
+      board.wait(2000, motor.stop);
+    });
+  });
+
+  [m1, m2].forEach( motor => {
+
+    // "stop" events fire when the motor is stopped.
+    motor.on("stop", () => console.log("stop"));
+  });
+
+  // Motor API
+
+  // start([speed)
+  // Start the motor. `isOn` property set to |true|
+  // Takes an optional parameter `speed` [0-255]
+  // to define the motor speed if a PWM Pin is
+  // used to connect the motor.
+  m1.start();
+  m2.start();
+
+  // stop()
+  // Stop the motor. `isOn` property set to |false|
+});
+
+```
+
+
+
+
+
+
+
+
+&nbsp;
+
+<!--remove-start-->
+
+## License
+Copyright (c) 2012-2014 Rick Waldron <waldron.rick@gmail.com>
+Licensed under the MIT license.
+Copyright (c) 2015-2019 The Johnny-Five Contributors
+Licensed under the MIT license.
+
+<!--remove-end-->

eg/motor-vnh5019.js

@@ -30,7 +30,7 @@ board.on("ready", () => {
       console.log(`start motor ${index+1}`);
 
       // Demonstrate motor stop in 2 seconds
-      this.wait(2000, motor.stop);
+      board.wait(2000, motor.stop);
     });
   });
 

tpl/programs.json

@@ -479,6 +479,10 @@
       {
         "file": "motor-drv8871.js",
         "title": "Motor - Adafruit DRV8871 DC Motor Driver Breakout"
+      },
+      {
+        "file": "motor-vnh5019.js",
+        "title": "Motor - Pololu VNH5019 Dual Motor Driver Breakout"
       }
     ]
   },