.exports: Explicitly use UTF-8 even for `LANG`
.osx: Add ExpandedStateFor* variants for OS X 10.9

Closes #361.
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  .osx: Add ExpandedStateFor* variants for OS X 10.9
  .exports: Explicitly use UTF-8 even for `LANG`