SpikeWars: Added image drawing util.

spike-wars/src/main/js/spike-wars-artist.js

@@ -49,4 +49,8 @@ export default class SpikeWarsArtist {
       Math.floor(idx / this.cols) * this.tileHeight,
       this.tileWidth, this.tileHeight); }
  
+  drawImage(image: CanvasImageSource, row: number, col: number): void {
+    this.canvas2d.drawImage(image,
+      row * this.tileWidth, col * this.tileWidth,
+      this.tileWidth, this.tileHeight); }
 }