_catalog.pot update - added more comments, resolved some misinformation

That "&" information was really misleading. In fact, I wondered if you knew it IS used in transcripts...

I added some lists to episodes where the name is used to help translators update their name translations, since the script only does it if the name was in English.

I named birds, because some languages use more words for it (E.g. Spanish has "pájaro"(small like sparrow) and "ave"(any) )
"Audience" has several meanings, so I gave it some context.

I had an idea: what if in EP38, when Pepper says she's "Peph'ra", the transcripts also reflect that? (would require adding "Peph'ra" to the .po files)

And I updated and added some language (project) labels on framagit.