New Section: Drawing Shapes

I wonder if there's a more efficient way to create vertices:

```haxe
var vertices = new Array<FlxPoint>();
vertices[0] = new FlxPoint(0, 0);
vertices[1] = new FlxPoint(100, 0);
vertices[2] = new FlxPoint(100, 300);
vertices[3] = new FlxPoint(0, 100);
```