Create an archive/container format for publishing Playtools data

(From tasks listed at <http://strongdynamic.blogspot.com/2007/08/d-datahead-community-iii.html>)

"""
An archive form of the document standard will have to be brainstormed and spec'd out. This format should allow us to zip/bundle N3 with a more prose-focused format like XHTML, so we don't have to crowbar a human-readable description of a red dragon into N3.
"""

Immediate use case is storing in a useful form the large gobs of markup contained in single columns of the relational SRD database.