add info about MathJax

Author: etpinard

Diff for: dist/README.md

@@ -1,15 +1,31 @@
-
+# Using distributed files
 
 Import plotly.js as:
 
-```js
+```html
 <script type="text/javascript" src="plotly.min.js"></script>
 
 ```
 
-To support IE9, import plotly.js as:
+or the un-minified version as:
+
+```html
+<script type="text/javascript" src="plotly.js" charset="utf-8"></script>
+```
+
+To support IE9, put:
 
-```js
+```html
 <script>if(typeof window.Int16Array !== 'function')document.write("<scri"+"pt src='extras/typedarray.min.js'></scr"+"ipt>");</script>
-<script type="text/javascript" src="plotly.min.js"></script>
 ```
+
+before the plotly.js script tag.
+
+
+To add MathJax, put
+
+```html
+<script type="text/javascript" src="mathjax/MathJax.js?config=TeX-AMS-MML_SVG"></script>
+```
+
+before the plotly.js script tag. You can grab the relevant MathJax files in `./dist/extras/mathjax/`.