Move sparks into dedicated datatype

src/Dodge/Render/ShapePicture.hs

@@ -6,6 +6,7 @@ import Dodge.Creature.Picture.Awareness
 import Dodge.Creature.Picture
 import Dodge.Particle.Draw
 import Dodge.Bullet.Draw
+import Dodge.Spark.Draw
 import Dodge.RadarBlip
 import Dodge.Flare
 import Dodge.ShortShow
@@ -85,6 +86,7 @@ cullPoint cfig w p
 extraPics :: Configuration -> World -> Picture
 extraPics cfig w = pictures (_decorations w)
     <> concatMapPic drawParticle (_particles    w)
+    <> concatMapPic drawSpark (_sparks    w)
     <> concatMapPic drawBul (_bullets w)
     <> concatMapPic drawBlip (_radarBlips    w)
     <> concatMapPic drawFlare (_flares    w)