Spellpower gems

1-5 spellpower, one gem for each school.

These still aren't actually in the game, but I would like to get them in for testing. I'm going to build different types of gems over time when inspiration strikes until we get a cool system in place.

Currently there are resist gems, 1-5% for each type of element. These will match those, spawning at 1-5 power for each school. So, for example, if a body armor had max 4 sockets, a player could give that armor up to +20% resistance (with four extremely rare gems, 1/1000 chance) to one element, or up to +20 spellpower to one school.

I assume we're balancing armor, too, at some point, so I don't imagine these will just be slapped onto existing armors.