Add Xonsh to project list

Author: Carreau

_sections/30-projects.md

@@ -18,4 +18,5 @@ style: center
 - [QIIME](http://qiime.org)
 - [gala](https://gala.readthedocs.io)
 - [cual-id](https://github.com/johnchase/cual-id)
+- [xonsh](https://xon.sh)
 

site.js

@@ -127,6 +127,9 @@ $(document).ready(function (){
       {content: '1.x', start: '2010-04-09', end: '2017-12-31', py2:true},
       {content: '2.x+', start: '2016-07-11', end: '2021-12-16'},
     ],
+    'Xonsh':[
+      {content: '0.x series – Python 3.4+', start: '2015-03-09', end: '2021-12-16'},
+    ],
     // for tests, rando example
     //'matplotlib':[
     //  {content: 'matplotlib 2.x', start: '2015-06-01', end:'2018-06-01', py2:true},