Adds a Live Preview that updates the color display as the user mouses over the color cells

:warning: dependent on: https://github.com/recurser/jquery-simple-color/pull/7

This changes the color of the color display as the user mouses over the color cells. If no color is selected and the selector is closed, the display will revert to the original color automatically.

usage:
```javascript
 $('.simple_color_live_preview').simpleColor({
      livePreview: true
  });
```