Clean up usage of automake and autoconf
install various minor tidbits in documentation directory
autogen.sh full refresh including INSTALL; rename old INSTALL README-INSTALL

Add the --force option to autoreconf in autogen.sh.  This installs the
"system" INSTALL file.  We therefore move the old custom INSTALL to README-INSTALL.
Merge remote-tracking branch 'savannah/master' into suggest-v3.x

Conflicts:
	.gitignore
	configure.ac
	lisp/bbdb-version.el.in