Merge branch 'nk/stash-show-config'

Users who are too busy to type three extra keystrokes to ask for "git stash show -p" can now set stash.showPatch configuration varible to true to always see the actual patch, not just the list of paths affected with feel for the extent of damage via diffstat. * nk/stash-show-config: stash: allow "stash show" diff output configurable