Modify layout of territories map

[alicefeng]

It'd be great if we could show the territories using a grid as seen in this blog post map instead of the current urbnmapr default layout. The grid makes it easier to figure out which label goes with which island and feels more organized. (I think Alaska and Hawaii can stay where they currently are in the urbnmapr layout though.)

[sstrochak]

@alicefeng this is a cool idea, I'll look into it!