Add new .npmrc file for node.js npm package manager.
i3: Add keyboard shortcuts for backlight, lock screen, and autorandr.
xinitrc: Back on a ThinkPad, remove DPI setting for MacBook.
xinitrc: Don't run autorandr monitor script, move to keyboard shortcut.
xrandr: Remove autocutsel, makes clipboard even odder than before...
zprofile: Don't set path to SWT toolkit, Android SDK provides its own.
zprofile: Add local npm repository to PATH.