Updated the README for 0.3.9.
Version bump.
Bumped the date for 0.3.9.
Added PGP signature for v0.3.9
Updated the homebrew formula for 0.3.9.
Updated the rpm spec for 0.3.9.
Update brew formula opt shortcut.
Merge branch 'master' of https://github.com/postmodern/chruby