Update translations from Transifex

Many thanks to:
 - cs: Daniel Albers <daniel@lbe.rs>
 - da: Daniel Albers <daniel@lbe.rs>, furyfire <frazzer@hotmail.com>
 - de: Daniel Albers <daniel@lbe.rs>, m4yer <m4yer+quassel@minad.de>, ToBeFree <tobias@freiwuppertal.de>, Heffer <felix@fetzig.org>
 - el: Daniel Albers <daniel@lbe.rs>
 - en_GB: Daniel Albers <daniel@lbe.rs>
 - en_US: Daniel Albers <daniel@lbe.rs>
 - eo: Daniel Albers <daniel@lbe.rs>, cordata <tiffypet@yahoo.com>
 - es: Daniel Albers <daniel@lbe.rs>
 - fi: Larso <larso@gmx.com>, Daniel Albers <daniel@lbe.rs>
 - fr: Daniel Albers <daniel@lbe.rs>, Dorian <munto@free.fr>, GrecKo <gr3cko@gmail.com>
 - gl: Daniel Albers <daniel@lbe.rs>, Condex <elgomaisa@gmail.com>
 - hi: Daniel Albers <daniel@lbe.rs>, libregeekingkid <rajuvindane@gmail.com>
 - hu: Daniel Albers <daniel@lbe.rs>, ulysses <ulysses@kubuntu.org>
 - it: Daniel Albers <daniel@lbe.rs>
 - ja: Daniel Albers <daniel@lbe.rs>
 - ko: Daniel Albers <daniel@lbe.rs>
 - lt: Daniel Albers <daniel@lbe.rs>
 - mr: Daniel Albers <daniel@lbe.rs>, libregeekingkid <rajuvindane@gmail.com>
 - nb: Daniel Albers <daniel@lbe.rs>
 - nl: Daniel Albers <daniel@lbe.rs>, simonphilips <simon.philips@gmail.com>
 - oc: Daniel Albers <daniel@lbe.rs>, Cedric31 <cvalmary@yahoo.fr>
 - pl: Daniel Albers <daniel@lbe.rs>, derpella <matwa@poczta.pl>
 - pt: Daniel Albers <daniel@lbe.rs>
 - pt_BR: Daniel Albers <daniel@lbe.rs>, Pad <pedroaraujo@colorlesscube.com>
 - ro: Daniel Albers <daniel@lbe.rs>
 - ru: Daniel Albers <daniel@lbe.rs>
 - sl: Daniel Albers <daniel@lbe.rs>
 - sq: Daniel Albers <daniel@lbe.rs>
 - sr: Daniel Albers <daniel@lbe.rs>, JovanJ <jovanjojkic@gmail.com>
 - sv: Daniel Albers <daniel@lbe.rs>
 - tr: Daniel Albers <daniel@lbe.rs>, volkangezer <volkangezer@gmail.com>, zeugma <sunder67@hotmail.com>
 - uk: Yuri Chornoivan <yurchor@ukr.net>
 - zh_CN: Daniel Albers <daniel@lbe.rs>, leonfeng <rainofchaos@gmail.com>