generate locale-specific variants

Take a optional argument for locale and use this to influence the types of variants returned, such as culturally specific name-order conventions, and alternative transliterations.

```
getAliases("Hayao Miyazaki", "jp") => [ ... , "Miyazaki Hayao",  ...]
getAliases("Екатерина Александровна Гордеева", "ru") => [... "Ekaterina Alexandrovna Gordeeva",  ...]
```