Remove derived PDFs from repo; now in 'src' repo, comstructed by HCFILES and MAKE-INDEX-HTMLS (#1657)

* Remove derived PDFs from branch other than gh-pages

* only the gh-pages branch should have the pdfs

* make pdfs and listings

* Update HCFILES and MAKE-INDEX-HTMLS, add preliminary documentation

* add a slashit to avoid angle brackets

Author: masinter

.gitignore

@@ -5,13 +5,21 @@ tmp/*
 # releases directory
 releases/*
 
+# all PDFs (those explicitly checked in aren't ignored
+# normally when you have derived files, you ignore them from git
+# because they will get regenerated when you rebuild.
+# MEDLEY-UTILS HCFILES regenerates
+
+*.pdf
+
 
 # all loadup files 
 
 loadups/exports.all
 library/RDSYS*
 loadups/lisp.sysout
 loadups/full.sysout
+loadups/fuller.sysout   # not currently included but might as well ignore it
 loadups/*.dribble
 loadups/whereis.hash
 loadups/apps.sysout