Uniform Grid Atlas from msdf-atlas-gen branch

[freelowdr]

Hi, thanks for creating msdf-bmfont-xml . It works perfectly for me.

I've also been using the Uniform Grid Atlas branch of msdf-atlas-gen .
https://github.com/Chlumsky/msdf-atlas-gen/tree/grid-atlas

It allows for the option to set the glyphs in a uniform grid like the one shown here with even spacing between glyphs neatly stacked and squared. Could have applications for some users so just suggesting it for consideration. I know that msdf-bmfont-xml is based on msdfgen, not msdf-atlas-gen specifically, but I have fingers crossed that it can still be incorporated somehow.