Card Upgrade System — Guild Quest Steam update #595550

Hoooo doggy. This is potentially the biggest update we've worked on since launching. And it turns out this is actually the first idea we had for how we wanted to handle cards, but decided that was going to take too long to build so we didn't do it. (But we sure ended up regretting that decision. Game development!) We've found one of the big issues with our cards is that there's too many of them, and too many of them are useless, which leads to a lot of knock-on issues (a largely useless collection of cards and chests are boring to open since it's just more useless cards). This wasn't an update to a major system so much as a complete rebuild of a major system. First things first Your cards have changed! We've limited the amount of cards there are to collect now. So, for example, instead of having 4 different Common Cleric DMG cards, there's now only 1. Any Common Cleric DMG cards you have...