Merge branch 'ns/stash'

* ns/stash:
Documentation: quote {non-attributes} for asciidoc
git-stash: don't complain when listing in a repo with no stash
git-stash: fix "can't shift that many" with no arguments
git-stash: fix "no arguments" case in documentation
git-stash: require "save" to be explicit and update documentation
Document git-stash
Add git-stash script

diff --cc .gitignore
Simple merge

diff --cc Makefile
Simple merge