Default connector and default room

[jacobtomlinson]

When writing a skill which originates from something other than a message (e.g cron #26) the response may need to know which room to post into.

Most chat clients have a default room, like #general in Slack. This could be available as a property in the connector so that skills can easily access it.

e.g

@non_message_decorator()
def myskill(opsdroid):
    for connector in opsdroid.connectors:
        message = Message("Message text", connector.default_room, None, connector)
        connector.respond(message)

It should also be possible to override the default room in the connector config.

connectors:
  slack:
    default-room: "#random"

[jacobtomlinson]

It would also be good to have a default connector. This could either be the first specified or the one tagged with default: true (or the first one tagged in case of error).

e.g

connectors:
  slack:
  shell:
  campfire:
    default: True

This could be accessed like:

@non_message_decorator()
def myskill(opsdroid):
    connector = opsdroid.default_connector
    message = Message("Message text", connector.default_room, None, connector)
    connector.respond(message)