Update index.html to reflect readme

Updates the API section documentation from color and height, to setColor and setHeight

Author: anthwinter

index.html

@@ -277,10 +277,10 @@ <h2>
             <pre>ngProgress.start();</pre>
             <p>Starts the animation and adds between 0 - 5 percent to the loading percentage every 400 milliseconds. Should always be finished with progressbar.complete() to hide it.</p>
 
-            <pre>ngProgress.height();</pre>
+            <pre>ngProgress.setHeight('10px');</pre>
             <p>Sets the height of the progressbar. Use any valid CSS value Eg '10px', '1em' or '1%'.</p>
 
-            <pre>ngProgress.color();</pre>
+            <pre>ngProgress.setColor('#fff');</pre>
             <p>Sets the color of the progressbar and it's shadow. Use any valid HTML color</p>
 
             <pre>ngProgress.status();</pre>