[WIP] Merge Baxter branch

[knorth55]

• [ros_speech_recognition] add auto_start in speech_recognition_node.py [ros_speech_recognition] add auto_start in speech_recognition_node.py #301
• add speech_to_text_other topic name in speech_to_text_mux [dialogflow_task_executive] add speech_to_text_other topic name in speech_to_text_mux #302
• add soundplay_action_name param in dialogflow_client [dialogflow_task_executive] add soundplay_action_name param in dialogflow_client #308
• add volume param in dialogflow_client [dialogflow_task_executive] add volume param in dialogflow_client #309
• support non japanese languages in dialogflow_client [dialogflow_task_executive] support non japanese languages in dialogflow_client #310
• add optional args in dialogflow_task_executive.launch [dialogflow_task_executive] add optional args in dialogflow_task_executive.launch #312
• support yaml load in dialogflow_client [dialogflow_task_executive] support yaml rosparam load of credential json in dialogflow_client #313
• Fix merging add sample code of dialogflow #317 [dialogflow_task_executive] Fix merging #317 #318
• [dialogflow_task_executive] load dialogflow project_id from credentials [dialogflow_task_executive] load dialogflow project_id from credentials #319