PKGBUILD for archlinux

so far without check() because of unsatisfied deps:

* python{,2}-docutils is in community
* cram is in AUR

which is problematic in build.opensuse.org; i'll revisit this.
GNUmakefile has a $(name).spec{.in -> ''} rule
standardize on neuhauser+git-mailz@sigpipe.cz