Adds simple WSGI app example

Author: jamesroberts

wsgi_example.py

@@ -0,0 +1,9 @@
+import fastwsgi
+
+def app(environ, start_response):
+    headers = [('Content-Type', 'text/plain')]
+    start_response('200 OK', headers)
+    return [b'Hello, World!']
+
+if __name__ == '__main__':
+    fastwsgi.run(wsgi_app=app, host='0.0.0.0', port=5000)