Adds multiplayer support

[jasonmash]

• Adds ScenarioBuilder (from @joeShuff 's branch)
• Adds GameSnapshot
• ScenarioBuilder can handle multiple players (specify a number greater than 0)
• GameMain has a noPlayers variable that determines how many players are currently active
• GameMain has a list of snapshots with an associated currentPlayerId variable and currentSnapshot for easy access in other classes
• Modified InventoryScreen and NavigationScreen to handle multiple players

[jasonmash]

Nice one @joeShuff! That's definitely a better way of doing it, thanks.

[jasonmash]

I've got a playable multiplayer game working now, feel free to try it out!

There's a bug I've not gotten round to fixing yet - it's to do with the PlayerSwitchScreen showing too soon after interacting with a clue when you've only got 1 interaction left before your go is over. It's not an easy fix due to the timeout of the speech box that the user needs to see. If anyone else wants to have a go at this feel free

[Brookke]

Not looked at the code, but could you just check to see if the list containing speechboxes is empty? and if so then change?

[joeShuff]

I'll have a go at tackling it @jasonmash. I'll be back in York soon. Will give me something interesting to do this evening

[jasonmash]

Potentially @Brookke - at the moment currentSnapshot.finishedInteraction(); is called once a conversation is finished, or when interacting with a clue. I'm not sure we've got an event for after the Clue speech box disappears we can put that code into. Shouldn't be too challenging to solve, just needs a bit more thought!

[joeShuff]

I see what you mean @jasonmash

[joeShuff]

Might be easier if we were to add the clue screen in. But for now, I'll just do when the dialog box is closed for now

[beno11224]

Aside from the 'doc string' comments by Joe, this seems done doesn't it?

[joeShuff]

Yeah it does @beno11224

[joeShuff]

The only thing we could do is add the possible additions

[joeShuff]

Like, #50

[beno11224]

k, u ok if i make a new branch to add things like that?

[joeShuff]

Go for it. Branch off of this branch, and create the PR to merge into this branch

[joeShuff]

This whole branch needs tests aswell. Poop