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

tests/basic/index.scss

@@ -0,0 +1,19 @@
+html{
+  width: 100%;
+  height: 100%;
+}
+
+body{
+  display: flex;
+  flex-direction: column;
+  overflow: auto;
+
+  width: 100%;
+  height: 100%;
+  padding: 0;
+  margin: 0;
+}
+
+.center-me{
+  align-self: center;
+}