BSPMapGen maps are aliased on HTML5

[Geokureli]

I'm not sure if there's something wrong with html bitmap drawing, or if the original coder specifically used a method that was very flash specific

Flash:

Html:

Mac:

[UncertainProd]

It looks like this is related to this issue with html5 canvases automatically antialiasing pixels that are on non-integer coordinates. And since openfl uses CanvasRenderer to draw stuff to bitmapdata objects, it gets affected by this as well. I think this can be fixed by just rounding off the rectangles' coordinates to the nearest integer.