[dialogflow_intent_client] The package for access to dialogflow intent settings

[mqcmd196]

TODO

• add documents

[k-okada]

please put this file uder dialogflow_task_executive to reduce mentenance cost.

[mqcmd196]

please put this file uder dialogflow_task_executive to reduce mentenance cost.

I tried it at first. This feature needs dialogflow pip package to be upgraded, and this causes the problems in

jsk_3rdparty/dialogflow_task_executive/node_scripts/dialogflow_client.py

Line 117 in a8464dc

msg.parameters = MessageToJson(result.parameters)

for protobuf. And I have concern about upgraded package cannot be built in indigo environment.

I thought I don't have to solve this problem now, but after my thesis, maybe I can handle this.