Add a Bottom to Top Tiling Direction option

[adrot]

Hi, and thanks a million for making this tool. I see it having potential for what I need. I was wondering if it would be viable to add a third tiling option: Bottom to Top. The reason is that the system which I use to get the tiles exports them out in this way, making it impossible for me to use any of the options listed.
Thanks in advance.

[johnbeech]

@adrot that's a fine idea - thanks for suggesting it.

I'll see about adding in an option to sort bottom to top in the near future. Stay tuned for updates.