add volume

src/fenrir-package/speech/espeak.py

@@ -59,5 +59,10 @@ class speech():
             return False
         return self._es.set_voice(language)
 
+    def setVolume(self, volume):
+        if not self._isInitialized:
+            return False    
+        return self._es.set_parameter(self._es.Parameter().Volume, volume)     
+
     def shutdown(self):
         pass