Minor correction of code for strikethrough text.
Added support for a noprint tag.
Added the first set of calendar and date entities.
Add programs to deal with simple bulleted text.  (Will be used for
overviews and adminstrivia.)
Add sample list of subjects.
Add mkoutline program, which creates the basic outlines.
Add program and instructions for building subjects.ent from subjects.var.
Fix bug in resources/Makefile
Add command to top-level Makefile to ensure that make is
run in resources first.
Update common.xsl and sect2docbook to include additional resources
(dates, calendar, and subjects).
Update sandbox/Makefile to build outlines.
Update the section Makefile to (1) convert bullets files to lists or
text and (2) clean up some of those files.
Ignore the sandbox, unless told otherwise.