add streaming-server with web client (#164)

* add streaming-server with web client

* small fixes

sherpa-onnx/python/sherpa_onnx/__init__.py

@@ -1,4 +1,5 @@
 from _sherpa_onnx import Display
 
 from .online_recognizer import OnlineRecognizer
+from .online_recognizer import OnlineStream
 from .offline_recognizer import OfflineRecognizer

sherpa-onnx/python/sherpa_onnx/online_recognizer.py

@@ -127,6 +127,7 @@ class OnlineRecognizer(object):
         )
 
         self.recognizer = _Recognizer(recognizer_config)
+        self.config = recognizer_config
 
     def create_stream(self):
         return self.recognizer.create_stream()