Add getter functions to the APIs

[Materdaddy]

I didn't take the time to research if there's a better way than a full query and loop to get a specific Did/Name information, but this currently works.

I wanted to create an application that used this library to toggle a bulb state without keeping my own state. I wanted to still be able to use the phone app and not confuse the state in my pygop-enabled application so querying the gateway state was a better solution.