First cut, command-line only for now; GUI is coming!
This utility takes a spreadsheet of addresses, along with some configuration specifying the dimensions of your mailing labels, and outputs a PDF file with the labels pre-filled and ready to print.
This is designed to work with the CSV files output by Patreon's Benefits Tracker tool, but should in principle work with any properly formatted CSV file. Mailing labels are specified using the [Go template language](https://golang.org/pkg/text/template/) and the first row is used to determine column names; see the -template option below for an example.
* Text that doesn't fit on one line isn't wrapped. For now, you can manually insert a linebreak in the relevant cell (using Calc or Excel or your preferred spreadsheet editor).
* unitStr doesn't affect fontsize
* In general nothing stops you from setting parameters that don't add up to the page dimensions
* Empty-address detection only works for Patreon CSVs