Highlight the side of the board whose current turn it is about joust

[beheh]

I'm not sure I like this too much. Aren't the options obvious enough?

[jleclanche]

There aren't necessarily any options.

[beheh]

Hm, #40 could be a solution here. But let's try. We could also do stuff with CSS filters, like black/white cards for the inactive player or something.

[jleclanche]

That would be amiss if the player has no more cards.

[beheh]

I meant including the hero and all UI elements and stuff. I'll try a few things out.

[azeier]

Added with 18353c9. Still needs some adjustment though.