Save game sharing and replays

0. DONE: Utilize random seed https://github.com/toddmedema/electrify/issues/78 1. DONE: Store game state to (local storage? firebase?), and re-load to exact same state 2. Import/export JSON blob of game state so you can share saves 3. Store and view replay: Initial random seed + list of decisions made + current state (and then replay you just re-watch the player actions at their realtime)