Buffs and counters

[dkniffin]

It's really tiresome to keep track of all the counters and buffs on the horde's creatures. To alleviate that, we should add some data for each card for counters (ie: "put a +1/+1 counter on target creature"), permanent buffs (ie: "all other zombies get +1/+1"), and temporary buffs (ie: "target creature gets +1/+1 until end of turn"). Then, we can show the total power/toughness on the card, by adding the base and any counters.

[dkniffin]

I added the fields to the state for this, and I'm displaying them on the card. I still need to make some buttons and actions for adding counters and modifiers.