Added Nepali (ne), Dutch (nl), and Chinese (zh) to settings.LANGUAGES, using the native language names found here: https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes

All three of these languages had translation contributions merged into the master branch in formhub/formhub/locale but no one had updated settings.py so that they would take effect.
Merge pull request #1297 from SEL-Columbia/update-language-locales

Added Nepali (ne), Dutch (nl), and Chinese (zh) to settings.LANGUAGES, u...