Convert part of the build to the new build system

The root makefile is converted as well as some leaf Makefiles. This
also brings in the required infrastructure and adjusts configure.in
appropriately.

I converted only makefiles containing no configurable stuff, since
that'll require more consideration yet.

debian/Makefile.am

@@ -1,19 +0,0 @@
-## Process this file with automake to produce Makefile.in
-## $Id: Makefile.am,v 1.5 2005/02/22 14:39:03 jonas Exp $
-
-EXTRA_DIST = \
- README.Debian \
- changelog \
- control \
- control.in \
- copyright \
- elinks.desktop \
- elinks.docs \
- elinks.postinst \
- elinks.preinst \
- elinks.prerm \
- menu \
- mime \
- rules
-
-DISTCLEANFILES = build-stamp elinks