Retain Game State

[swhalley]

Should we look to implement a cookie that stores the last list of participants?

This would allow us to load the game ahead of time and retrieve the list later without having to lookup the api key's etc at the venue

[evanepio]

That's good, but will we run into limits with cookie sizes?

We could try this if the cookie limits are too small:
https://developer.mozilla.org/en-US/docs/Web/API/Web_Storage_API

Supported by all recent browsers.

[swhalley]

#22 adds support for localStorage so games players can be remembered.

Didn't store game state between page loads. That can be something later.
Worked the loading mechanism so that if there is ever an error reading in the local storage (data structure changes or initializing for first time) the game will reset the local storage so it can store it next time.

[swhalley]

After changes for #28 are merged in. Change the localConfig to also store the theme and the choice if pictures should be displayed.