portage:
refactor package.use

  thanks to Philip Xu https://github.com/pyx/dotfile

xinitrc:
BROWSER variable for xmonad prompt

xmonad:
M-S-i for inverted colors provided by composite window manager compton
C-' k to summon `pure` (term-rewriting based programming language)

zsh:
put bin ahead of .local/bin to facilitate wrappers:

  LD_LIBRARY_PATH=/home/ray/.local/lib ~/.local/bin/pure "$@"

vim:
misc

kernel:
tuned for my ultrabook SVT13117ECS