Tests: added Python tests with encoding.

test/python/unicode/wsgi.py

@@ -0,0 +1,8 @@
+def application(environ, start_response):
+    temp_dir = environ.get('HTTP_TEMP_DIR')
+
+    with open(temp_dir + '/tempfile', 'w') as f:
+        f.write('\u26a0\ufe0f')
+
+    start_response('200', [('Content-Length', '0')])
+    return []