Render the main element correctly in IE

Close necolas#730

Author: Thomas Deinhamer

normalize.css

@@ -24,6 +24,14 @@ body {
   margin: 0;
 }
 
+/**
+ * Render the `main` element consistently in IE.
+ */
+
+main {
+  display: block;
+}
+
 /**
  * Correct the font size and margin on `h1` elements within `section` and
  * `article` contexts in Chrome, Firefox, and Safari.