added type global_theory -- theory or local_theory;
added begin/exit_local_theory;
removed theory_context;
renamed body_context_node to presentation_context;
removed copy (checkpoint twice instead -- avoids unrelated theories);
#!/usr/bin/env bash
#
# $Id$
#
# psbooklet - rearrange pages of ps file to be printed as booklet (duplex)
#
psbook "$@" | \
pstops '4:0L@.7(21cm,0cm)+1L@.7(21cm,14.85cm),3R@.7(0cm,14.85cm)+2R@.7(0cm,29.7cm)'