Major rework of basic game code - pre-work for multiplayer

Includes automatic generation of required HTML elements and better responsiveness

js/local-player.js

@@ -0,0 +1,21 @@
+class LocalPlayer extends Player {
+    constructor(gameInfo, game) {
+        super(gameInfo, game);
+
+        this.isHolding = false;
+        this.holdingTile = null;
+    }
+
+    hold() {
+        if (this.isHolding)
+            return;
+        if (this.holdingTile === null) {
+            this.holdingTile = this.matrix;
+            this.reset(true);
+        } else {
+            this.holdingTile = [this.matrix, this.matrix = this.holdingTile][0];
+            this.reset(true, false);
+        }
+        this.game.drawHolding();
+    }
+}