Translation update working again, fixed some unused translations in the UI

[ingo.schommer]

Hello translators,

Sorry for the radio silence on the translation issues recently, I was on a two week leave. 

In short: Some of your translations weren't used in the UI due to a bug,

and they are now updated automatically again.

Note: You'll still need to use the 3.0 github branch to preview your changes

(so a newer codebase than the recent 3.0.1 release).

More details at https://groups.google.com/forum/#!topic/silverstripe-dev/TZX-4kFkcis

and http://open.silverstripe.org/ticket/7707#comment:7

Thanks for your patience

Ingo