0.20.0 documentation styling and javascript assets are broken
I followed the [WhatsNew](http://pandas.pydata.org/pandas-docs/version/0.20.0/whatsnew.html) link for version 0.20.0 from the [Releases](https://github.com/pandas-dev/pandas/releases/tag/v0.20.0) page, and faced a page with no style (expand details below to see screenshot).

<details>

![image](https://cloud.githubusercontent.com/assets/438648/26036976/fd3f61d0-38d8-11e7-81db-cb72f6f87a92.png)

</details>

---

The reason seems to be that the webserver is misconfigured, for instance, the [following link](http://pandas.pydata.org/pandas-docs/version/0.20.0/_static/jquery.js) (a dependency of `whatsnew.html`) loads HTML, and not javascript:

```
$ curl -si http://pandas.pydata.org/pandas-docs/version/0.20.0/_static/jquery.js | head -n20
HTTP/1.1 200 OK
Server: nginx/1.0.5
Date: Sun, 14 May 2017 19:13:54 GMT
Content-Type: text/html
Content-Length: 25789
Last-Modified: Fri, 05 May 2017 21:21:06 GMT
Connection: keep-alive
Accept-Ranges: bytes

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">


<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <script type="text/javascript">

      var _gaq = _gaq || [];
      _gaq.push(['_setAccount', 'UA-27880019-2']);
```



**Note**: I realise that the latest stable docs don't have this problem, but I thought this was worth reporting nonetheless.