Remove px for width and height attribute.

The values of width and height always in px and you have to insert just an integer
http://www.w3.org/wiki/HTML/Elements/iframe#HTML_Attributes

Author: woneob

index.html

@@ -16,7 +16,7 @@ <h1>img2css.</h1>
       <div>This is a tool that can convert any image into a <i>pure css</i> image.</div>
       <div>Try it! (It's cpu heavy, please try with a small image first).</div>
       <br />
-      <iframe src="https://ghbtns.com/github-btn.html?user=javierbyte&amp;repo=img2css&amp;type=star&amp;count=true" frameborder="0" scrolling="0" width="170px" height="20px"></iframe>
+      <iframe src="https://ghbtns.com/github-btn.html?user=javierbyte&amp;repo=img2css&amp;type=star&amp;count=true" frameborder="0" scrolling="0" width="170" height="20"></iframe>
 
     </div>