New i18n gen

I wrote a complete new version of the i18-gen-Skript since it had some major issues:
- you had to generate files by hand
- created translations used an old version of the pot-file since it got only generated in the skript itself
- languages hardcoded into the skript
- when updating one language every language file had to be recompiled

Now the workflow is:
1. *./i18n-gen.sh init dk* **or (if already existing)** */i18n-gen.sh update dk*
2. translating the language file as usual
3. */.i18-gen.sh gen dk*