Xonsh shell has jedi extension (#1674)

* xonsh shell has jedy extension

* jedin in xonsh shell usage

* and many more! :)

README.rst

@@ -52,6 +52,7 @@ Jedi can currently be used with the following editors/projects:
 - wdb_ - Web Debugger
 - `Eric IDE`_ (Available as a plugin)
 - `IPython 6.0.0+ <https://ipython.readthedocs.io/en/stable/whatsnew/version6.html>`_
+- `xonsh shell <https://xon.sh/contents.html>`_ has `jedi extension <https://xon.sh/xontribs.html#jedi>`_
 
 and many more!