add light piece set

modules/pref/src/main/PieceSet.scala

@@ -28,7 +28,7 @@ sealed trait PieceSetObject {
 
 object PieceSet extends PieceSetObject {
 
-  val all = NonEmptyList("cburnett", "merida", "pirouetti", "alpha", "spatial") map { name => new PieceSet(name) }
+  val all = NonEmptyList("cburnett", "merida", "pirouetti", "alpha", "spatial", "light") map { name => new PieceSet(name) }
 }
 
 object PieceSet3d extends PieceSetObject {

public/stylesheets/board.css

@@ -380,6 +380,43 @@ body.is2d.spatial .cg-piece.queen.black {
 body.is2d.spatial .cg-piece.king.black {
   background-image: url(../piece/spatial/bK.svg);
 }
+body.is2d.light .cg-piece.pawn.white {
+  background-image: url(../piece/light/wP.png);
+}
+body.is2d.light .cg-piece.bishop.white {
+  background-image: url(../piece/light/wB.png);
+}
+body.is2d.light .cg-piece.knight.white,
+#top .cg-piece.light {
+  background-image: url(../piece/light/wN.png);
+}
+body.is2d.light .cg-piece.rook.white {
+  background-image: url(../piece/light/wR.png);
+}
+body.is2d.light .cg-piece.queen.white {
+  background-image: url(../piece/light/wQ.png);
+}
+body.is2d.light .cg-piece.king.white {
+  background-image: url(../piece/light/wK.png);
+}
+body.is2d.light .cg-piece.pawn.black {
+  background-image: url(../piece/light/bP.png);
+}
+body.is2d.light .cg-piece.bishop.black {
+  background-image: url(../piece/light/bB.png);
+}
+body.is2d.light .cg-piece.knight.black {
+  background-image: url(../piece/light/bN.png);
+}
+body.is2d.light .cg-piece.rook.black {
+  background-image: url(../piece/light/bR.png);
+}
+body.is2d.light .cg-piece.queen.black {
+  background-image: url(../piece/light/bQ.png);
+}
+body.is2d.light .cg-piece.king.black {
+  background-image: url(../piece/light/bK.png);
+}
 body.is2d.alpha .cg-piece.pawn.white {
   background-image: url(../piece/alpha/wP.svg);
 }