changeable queue size

[laferrieren]

Depending on the job size having an adjustable queue is useful for larger batch renders where you need more than just 20,000 tiles. Being able to adjust the size on the cli sazes the time from having to edit the file on your system.

I just added a param that allowed for setting the queue size, you find can find an example of it below. I would just do a pull request but you have made so many changes today it would run into merge conflicts. https://github.com/sessionm/invar/blob/b616f84ade97c74f67d66fa89c34e79195d63b23/ivtile