Improved Presenter-Client protocol

[WilliamChiu]

Currently, those who connect ask "are there presenters", and are put in a pending state where they await a response from potential presenters. If they hear from a presenter, they are assigned client, and if they do not, they assign themselves presenter. The delay before being assigned presenter is currently necessary because of the case where:

• There is a presenter A
• B and C connect at the same time
• B and C both ask "are there presenters" and both respond "yes" to both themselves and A
• This kicks A out of presenting

However, there may be a way to avoid this delay by sending and receiving timestamps to validate claims of presentership:

• There is a presenter A
• B and C connect at the same time
• B and C both ask "are there presenters" and both respond "yes, I have been presenting since ___" to both themselves and A
• A does not assign itself to client as it compares the timestamp received and its own timestamp and sees it has been presenting for longer