[Officeshots] Catalan translation

[robert.buj at gmail.com]

Hi,

Catalan translation updated.

I have translated missing strings, and I have also fixed some sentences.

Best regards,

Robert
-- 
ca: M'agradaria millorar el món, però Déu no em dóna el codi font!
de: Ich würde gern die Welt verbessern, doch Gott gibt mir den Quellcode nicht!
en: I would like to improve the world, but God not gives to me the source code!
es: Me gustaría mejorar el mundo, pero Dios no me da el código fuente!

gpg fingerprint = 0800 D37B C187 CC6E 9D0C 0AF4 265D 0096 AC78 6412
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