Hi,
PRTemplate was removed in the development version because our goal is simplify Pillar. To do this, we want Pillar generate only the content of a document, so the template system was removed. If you want use PRTemplate, you can use the last stable release of Pillar, and if you want use the development version, you wil need to write a Makefile (Our Makefile is not useful for the moment) and put the content in a template engine like Mustache (the Pharo version is usable with a command line since this week).
Yann