i3: Move dmenu keybinds, use Space instead of D
ncmpcpp: 'keys' is now 'bindings'

As of ncmpcpp 0.6
ncmpcpp: Update config for 0.6 too
ncmpcpp: Don't use left/right as volume keys
brightness: Update sample tmpfiles.d configuration
i3: Send screenshots straight to ~/.screenshots

Which can be a symlink to something like ~/Dropbox/Public/Screenshots