language changes & regenerated euc_kr index.
0.2.9: language changes, new euc_kr index.

- Language changes: `std::str::from_utf8` has been changed.
- Removed a workaround for the broken euc_kr index from 0.2.8.
  This bumps the version of the Korean index subpackage.
- "Encoding" is now the official name of the library.