Add reset command

Author: nshmyrev

websocket/asr_server.py

@@ -13,6 +13,8 @@
 def process_chunk(rec, message):
     if message == '{"eof" : 1}':
         return rec.FinalResult(), True
+    if message == '{"reset" : 1}':
+        return rec.FinalResult(), False
     elif rec.AcceptWaveform(message):
         return rec.Result(), False
     else: