Steping on a D4 without shoes on now acts as if you stepped on glass.

I had this idea with the other dice stuff, but dismissed it as silly snowcode that would have just lower my odds of getting it commited. Since several people have asked for this functionality in the time since, here it is.
Did what I could to make the die/shard code for this not as shitty, as implored and largely written by Aranclanos
Removed some redundant code
Merge pull request #995 from Incoming5643/dice

Steping on a D4 without shoes on now acts as if you stepped on glass.