Remove reference to unused translations popup
Fix problems with missing translations

We now store the translations from HappyTranslate in a local file
'translations.json'. This avoids the timeouts when fetching the
translations with HTTP requests.

The translations can be imported by running a command like this:

wget http://happytranslate123.appspot.com/api/youtify/export -O
translations.json

Remember to git commit when done!