Revamp acrepo-exts-template to use different templates
From comments in #4 (comment 739)
The idea is to revamp this module to work with any supplied template. There would be a URL param that points to a template, so it's flexible. Perhaps the default could be a mustache template, but others could be supplied via this param. Or we could have a cfg variable that has the URL of the default (mustache) and that could be overridden by a URL param, if the user wants.