fixed some translation and added description

Signed-off-by: Tobias Kohlbau <tobias.kohlbau@gmail.com>
copy values-de/strings.xml to values-de_DE/strings.xml

Signed-off-by: Tobias Kohlbau <tobias.kohlbau@gmail.com>
Merge pull request #3 from tobiaskohlbau/master

Added description and fixed some spelling issues