Merge pull request #54 from adammark/patch-1

Update README.md

README.md

@@ -18,6 +18,12 @@ Download the built files from [the releases page](https://github.com/khan/katex/
 <script src="/path/to/katex.min.js" type="text/javascript"></script>
 ```
 
+Specify UTF-8 as your content type:
+
+```html
+<meta charset="utf-8">
+```
+
 Call `katex.render` with a TeX expression and a DOM element to render into:
 
 ```js