Add older CDE documentation in .ps format until newer documentation can be generated with dtinfo.

cde/doc/postscript/README

@@ -0,0 +1,10 @@
+This directory contains older CDE documentation in gzipped postscript
+format.  These can be converted to pdf files on linux with a command
+like this:
+
+gunzip -c AppBuilder.ps.gz |ps2pdf - /tmp/AppBuilder.pdf
+
+If/When dtinfo is ever made to work, we can get more up to date
+documentation from there.  Until then, old docs are better than no
+docs...
+