* Makefile: use info function for output and call shell only once
* default.mk: add PDFTEX and RMR variables for customization
* lisp/Makefile: add target 'all' and create $(lispdir) if necessary
* maint-targets.mk: invoke sub-make for HTML manuals
* maint.mk: remove unsused VARIABLES
* targets.mk: invoke sub-make for ./doc and clean up some targets
Achim Gratz