Blitzkrieg 1.3.2

From now on, I won't be pinging the Blitzkrieg role for minor updates. Anyway, this minor update includes an optimization for /today. The tank icons on the left were fetched every time someone used the command. The bot now caches those images allowing for an instantaneous load.

I noticed rendering times up to 3000ms for rendering stats of about 10 tanks. Cached images should now be indifferent to this.