Update res/values-de/strings.xml

Added disable_tracking_prevent_back and tracking_returned_no_location
Update res/values-it/strings.xml

translation for 01/17/2013 strings.
BTW: i noticed you fixed " symbol for strings with ' in the text, sorry ;D
Merge pull request #43 from pgschk/german-translation

Update res/values-de/strings.xml
Merge pull request #44 from ezio84/patch-5

Update res/values-it/strings.xml