$txt[media_posted_on] will use the EXIF Date of the picture instead the posted on date. So changing this string to the proper descritption.
Also change the string $txt[media_upload_file_too_big] to a more accurate wording in German.

Signed-off-by: Sven Rissmann <creaworld-media@gmx.de>
Merge pull request #22 from Pandos/de

German translation for the new elements of the contact list feature.
Merge pull request #18 from Pandos/de

$txt[media_posted_on] will use the EXIF Date of the picture instead the ...