Add tabletop components 486-500 and ten game icons

Fifteen pieces of a games night: Dice, DiceTray, PlayingCard, CardHand,
Deck, Chessboard, GoBoard, MahjongTile, Domino, Roulette, CoinFlip,
BingoCard, TicTacToe, ScoreTrack and Meeple. Component number 500 is
a meeple, which seems right.

Dice tumble, coins turn and wheels spin on a cue, a frame at a time,
and land at once under Reduce Motion. Hands lift the card you point
at and play the one drawn on top; pieces and stones pick the lighter
of Lit and Ink for White, so they read in every palette; the computer
plays a fair O; FREE is a star in every language.

New 12x12 icons: Spade, Club, Diamond, Meeple, King, Queen, Rook,
Bishop, Knight and Pawn.

tabletop/meeple.go

@@ -0,0 +1,43 @@
+package tabletop
+
+import (
+	"fmt"
+
+	"github.com/egoist/mygo/ui"
+
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/data"
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/icon"
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
+)
+
+type MeepleOptions struct {
+	// Player picks its color, 0 to 5.
+	Player int
+	// Empty leaves the slot open.
+	Empty bool
+}
+
+// Meeple is a player's token, standing in its slot.
+func Meeple(c *ui.Context, text string, o MeepleOptions) *ui.Element {
+	k := pixel.K(c)
+	if o.Player < 0 || o.Player >= len(players) {
+		panic(fmt.Sprintf("tabletop: Meeple player %d", o.Player))
+	}
+	e := ui.Box(c).Size(k.D(data.SlotSize), k.D(data.SlotSize)).Role(ui.RoleImage).Label(text)
+	if o.Empty {
+		e.Description(k.Msg("empty"))
+	}
+	return e.Draw(func(p *ui.Painter, r ui.Rect) {
+		g := k.Canvas(p, r)
+		// Slots look alike everywhere: an empty item slot holds it.
+		data.DrawSlot(g, 0, 0, data.Item{}, data.ItemSlotOptions{})
+		if o.Empty {
+			return
+		}
+		at := (data.SlotSize - 12) / 2
+		for _, d := range [][2]int{{-1, 0}, {1, 0}, {0, -1}, {0, 1}} {
+			g.Silhouette(at+d[0], at+d[1], icon.Meeple, 0, pixel.Edge, 1)
+		}
+		g.Sprite(at, at, icon.Meeple, 0, players[o.Player], 1)
+	})
+}