Adding a translator for french union catalog CCFr

As requested in [Zotero Forum](https://forums.zotero.org/discussion/37503) I've built this first version of a translator. 

It still misses somes specific cases but works for > 90% of records I'd say. CCFr catalog is full of JS, not that easy to parse.

Tests are style missing, hope it's not blocking.
I think it may also be an issue where a site is accessed over secure proxy. I don't think Zotero adjusts https to http (since it doesn't know that it should)