This small module provides a way of formatting bibliographic
references using style templates similar to those used by the popular reference
management software Endnote (http://www.endnote.com/). The API is
embarrassingly simple: a formatter object is made using the class's
constructor, the new() method; format() may then be repeatedly called on this
object, using the same or different templates.

(The sole purpose of the object is to cache compiled templates so that multiple
format() invocations are more efficient than they would otherwise be. Apart
from that, the API might just as well have been a single function.)