German TTS: Add proper article to street name

- Add article detection based on street name ending. E.g. auf die Hauptstrasse, auf den Feldweg.
- Removal of Semicolon in Destination Name. Prevents Instructions like: "Richtung München Semicolon Nürnberg"
- Changed order of Ref and Street Name. If available Street Name is spoken first. Low Level Refs like Staats and Kreisstrassen are no help in routing since not labeled.
Merge pull request #256 from bernibaer/patch-1

German TTS: Add proper article to street name