Cannot specify a Group as the actor when initializing by URL

[frasern]

At present, _initFromQueryString always assumes the actor parameter is an Agent, and simply ignores the objectType property if present. This means using a Group doesn't work as expected.

If the objectType property is present and set to "Group", the actor should be instantiated as a Group instead of an Agent.

[frasern]

Pull request created: #112

[garemoko]

Thanks for flagging this and for creating a PR. The launch spec is silent on whether groups should be supported, but I see no reason why we shouldn't.

I'm interested to know your use case?

[frasern]

Our training is sometimes going to be used in a classroom setting with a projector/big screen. In such cases we plan to use the Group functionality to record statements against the set of trainees present in the class.

[garemoko]

Thanks for sharing. I imagine that's not an uncommon use case actually.