support wasd navigation.

js/pixl/public/trixl.html

@@ -206,16 +206,16 @@
				}
			}
			if (isPressed(37)) {
			if (isPressed(37) || isPressed(65)) { // left || a
				trixl.pos.x += 0.1;
			}
			if (isPressed(38)) {
			if (isPressed(38) || isPressed(87)) { // up || w
				trixl.pos.z -= 0.1;
			}
			if (isPressed(39)) {
			if (isPressed(39) || isPressed(68)) { // right || d
				trixl.pos.x -= 0.1;
			}
			if (isPressed(40)) {
			if (isPressed(40) || isPressed(83)) { // down || s
				trixl.pos.z += 0.1;
			}
		});