Support for German workflow specifications

This Pull-Request adds support for alternative languages of the workflow specification.
It implements the German workflow specification parsing.

A German specification example can be found at: https://github.com/4teamwork/ftw.lawgiver/blob/jone-multilingual/ftw/lawgiver/tests/assets/languages/specification.de.txt
There is the same specification in English and a test verifies that the result is the same for both languages, this verifies that the multilingual implementation and the German language parsing works.

The Pull-Request also adds some minor changes (such as fixing `development.cfg` or extending debug information) as well as various multilingual related changes.

@maethu @deiferni 
/cc @phabegger