[WIP] Add config for multilanguage support

Test link:
python test/test.py -i ch_astra_unfaelle-personenschaeden_alle -e
python test/test.py -i ch_bafu_grundwasserschutzareale -e
Yes it's work, for layer with 4 language ou even if there is only one.
![example_multilangue](https://cloud.githubusercontent.com/assets/5321406/4571790/49589084-4f7d-11e4-9516-f56396e8f3d2.png)