Allow the user to request a particular translation (if > 1 available)

[jburb]

At least for English, perhaps for more languages, it would be cool if this supported all the translations available from api.globalquran. Or, for a small first pass, a few of the more well-known English tranlations in addition to currently-used yusufAli, such as sahih, arberry, pickthall, asad and maududi.