Add support and instructions for direct IPA texts.

[Michael Conrad]

I'm working with IPA for the Mohegan-Pequot language and do not see any options to indicate to the model that I am inputting IPA directly.

Example IPA: nʌhkˈʌnˈɔ̃ŋk nʌtˈɔ̃hkwamˈam‖

Mohegan: Nuhkunôk nutôhqamam.

English gloss: My head aches.