* README.md: Catalan translation draft.
* Improvements to the Catalan translation. Thanks for reviewing @oriolarcas
* Add Catalan version to German README
* Add Catalan version to Spanish README
* Add Catalan version to Indonesian README
* Add Catalan version to Hindi README
* Add Catalan version to Indonesian README
* Add Catalan version to Italian README
* Add Catalan version to Korean README
* Add Catalan version to Portuguese README
* Add Catalan version to Russian README
* Add Catalan version to Simplified Chinese README
* Add Catalan version to Traditional Chinese README
