ls specialized for OSX
merge usagi-origin/master
change user settings
change README
add export OpenCV_DIR
Merge branch 'master' of github.com:usagi/home
merge
Revert "change user settings"

This reverts commit fd0e7dca70c3ca1c62c06b8f3268d47027d6670c.
Revert "add export OpenCV_DIR"

This reverts commit c0ded2e617355dbf887c969d73afead749a38e1a.
Darwinにおけるls -Lオプション指定解除漏れの修正