YUI 3: Building Blocks - exercise 3

1. Complete the Y.example.Clock widget in the example-clock-3 module located in file clock-3.js
2. Create an instance of Y.example.Clock and render it into the #clock container.
3. Add CSS to clock-3.css to hide the clock when its hidden class is applied.
4. Move the CSS to a proper skin file location and add skinnable: true to the module metadata.

Create a Clock Show the clock Hide the clock