add demo to index page

Author: williamngan

demo/index.html

@@ -147,6 +147,7 @@ <h1><strong>Demo</strong><span id="description"></span></h1>
         <p class="demo" data-src="sound.timeDomain"><span>Sound.</span><strong>timeDomain</strong></p>
         <p class="demo" data-src="sound.freqDomain"><span>Sound.</span><strong>freqDomain</strong></p>
         <p class="demo" data-src="ui.track"><span>UI.</span><strong>track</strong></p>
+        <p class="demo" data-src="img.pixel"><span>Img.</span><strong>pixel</strong></p>
         <p class="demo" data-src="svgform.scope"><span>SVGForm.</span><strong>scope</strong></p>
         <p class="demo" data-src="htmlform.scope"><span>HTMLForm.</span><strong>scope</strong></p>