Fixed a bug relating to custom-elements's first vnode where render(){ return <div class="example" /> } would set the example-class on the custom-element itself.

Added support for className and style similar to react
Cleaned up some comments
Reworked how tests are built in order to add a new test "pdf" which was a small side-project where previous mentioned bug showed up, it's an example using HTML to create a PDF for printing

.idea/webResources.xml

@@ -15,6 +15,7 @@
             <path value="file://$PROJECT_DIR$/packages/csx" />
             <path value="file://$PROJECT_DIR$/packages/babel-plugin-transform-csx" />
             <path value="file://$PROJECT_DIR$/packages/csx/src" />
+            <path value="file://$PROJECT_DIR$/tests" />
           </resourceRoots>
         </entryData>
       </entry>