Support alternative layout similar to Microsoft Word and Open Office mail merge
I have a pull request ready, I just wanted to create an issue to track this.
I typically have an alpha-numeric sorting on the input to labelnation. With the default layout, this makes the resultant sheet more difficult to read.
I introduced a --layout-#### where the default is --layout-bltr, but --layout-tlbr can be used. I also added support for specifying the options numerous times and the last one in wins.