* libguile/lightning/lightning.am: New file. libguile will include
this. Contents initially from include/Makefile.am and
include/lightning/Makefile.am.
* libguile/lightning/include/Makefile.am:
* libguile/lightning/include/lightning/Makefile.am: Remove.
* libguile/lightning/configure.ac: Remove output of include Makefiles.