Ability to interact with multiple Mycroft instances

[seymour-bootay]

Ability to interact with multiple Mycroft instances, like message app contacts. Will need to modify settings to support this. Initial roll out will support rules for talking to different Mycroft instances based on which network you are connected to or ability to select one manually. I have plans to handle this better with a bolt solution on the Mycroft instances (unless mycroft-core implements something to take care of this first).