* doc/guix.texi (Package Modules): New node, with material formerly
under "GNU Distribution".
(Bootstrapping): New node.
* Makefile.am (EXTRA_DIST): Add doc/images/bootstrap-graph.dot and
doc/images/bootstrap-graph.eps.
(infoimagedir, dist_infoimage_DATA, DOT_OPTIONS): New variable.
(.dot.png, .dot.eps, doc/guix.pdf, doc/guix.info, doc/guix.ps): New
targets.
* doc/images/bootstrap-graph.dot: New file.