Update rails to 4.0.5
Update sass-rails with newer version of rails.
Apply the locale encoding to `tar --version`

Fixes a bug with non-UTF8 locales introduced by
2b816075dc71dfe8f6f9e5349fdff7f03ad9dad0.
Merge branch 'tar_version_encoding' into 'master'

Fix tar version string encoding bug
Merge branch 'rails_4_0_5' into 'master'

Rails 4.0.5