Update of Czech localization file. Note: the usual code for the Czech language in the filename, if a pattern such as "olive_cs.ts" is not used, is: cs_CZ.
The macro defined namespaces confused the hell out of lupdate and more or less broke translations permanently. Looks like the only way we can do it is to have a hardcoded namespace, which goes against my instinct, but honestly how likely is it that we'll change the namespace anyway (I guess forks might want to do it, but that's their problem ;) )