doc: Update README

 * On some rare cases, Windows installation interferes with simplejson
   package.  Guide the users to install a pre-built binary when they
   encounter this issue.

   - ContinuumIO/anaconda-issues#291
   - ContinuumIO/anaconda-issues#238
   - plotly/plotly.py#197

Author: achimnol

README.rst

@@ -164,3 +164,13 @@ Additionally, ``AsyncKernel`` offers async-only method ``stream_pty()``.
 It returns a ``StreamPty`` object which allows you to access a pseudo-tty of the kernel.
 ``StreamPty`` works like an async-generator and provides methods to send stdin inputs
 as well as resize the terminal.
+
+
+Troubleshooting (FAQ)
+---------------------
+
+ * If you are using Anaconda on Windows, installiing this package may break your
+   Python installation due to simplejson crashing.
+   In that case, uninstall the simplejson package manually and reinstall it by
+   downloading `a pre-built binary wheel from here
+   <https://www.lfd.uci.edu/%7Egohlke/pythonlibs/#simplejson>`_.