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/round3_test.go

@@ -0,0 +1,39 @@
+package tabletop_test
+
+import (
+	"testing"
+
+	"github.com/egoist/mygo/ui"
+
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/tabletop"
+)
+
+func TestBingoCardDrawsInsideItsGrid(t *testing.T) {
+	var numbers [25]int
+	for i := range numbers {
+		numbers[i] = i + 1
+	}
+	var m [25]bool
+	tt := view(400, 400, newWorld(), func(c *ui.Context) { tabletop.BingoCard(c, "B", numbers, &m, tabletop.BingoCardOptions{}) })
+	x, y, w, h := dots(find(t, tt, "B"))
+	// The letters sit nine dots above the grid.
+	if n := spill(tt.Image(), x, y-9, w, h+9); n > 0 {
+		t.Fatalf("the card spills %d dots past its grid", n)
+	}
+}
+
+func TestCardHandPlaysTheTopOfAnOverlap(t *testing.T) {
+	cards := []tabletop.Card{{Rank: 2, Suit: tabletop.Clubs}, {Rank: 3, Suit: tabletop.Clubs}}
+	played := -1
+	tt := view(400, 300, newWorld(), func(c *ui.Context) {
+		if i := tabletop.CardHand(c, "Hand", cards, tabletop.CardHandOptions{}).Played; i >= 0 {
+			played = i
+		}
+	})
+	r := find(t, tt, "Hand")
+	// Dots 18–35 hold both cards; the second is on top.
+	tt.ClickAt(r.X+2*24, r.Y+2*30)
+	if played != 1 {
+		t.Fatalf("a click where the cards overlap played %d", played)
+	}
+}