Update translations from Transifex

[Yury V. Zaytsev]

On Sat, 29 Apr 2017, Antoni Bella Pérez via mc-devel wrote:

> I updated Catalan (ca) translations from Transifex and I ask them to 
> update the repository. Doing so automatically or on request?

Normally, we pull in translations from Transifex manually before release, 
but since there have been quite some changes already, I've imported them 
right now... Thank you for your contribution!

-- 
Sincerely yours,
Yury V. Zaytsev