+For building the PDF version, you need a reasonably recent installation of
+TeX Live. Release 2014 will do. You will also need the Emerald font
+package from https://www.ctan.org/tex-archive/fonts/emerald/. This cannot
+be installed with `tlmgr`, nor does it seem to be packaged by the usual
+Linux or BSD distributions. Scripts for installing and uninstalling
+Emerald are provided in the `tools` directory. When you're ready, type
+this:
+
+ make latexpdf
+