#8 pixel grid, a-la MS Paint

[Tavys Ashcroft]

I used to use MS Paint until I found tile studio. Now
the only feature I miss is the grid. Is there one that
I just haven't found? Most of my tiles are 16x16, but
when I get into bigger stuff, I really miss the grid.
It can be hard to visualize 32x32 without it.

Thanks for making such a great tile editor!