Update strings.xml

translate new strings
fix: last week statistics
Merge pull request #27 from ogr3/master

New strings translated to Swedish
Merge pull request #26 from knight00931/patch-1

Update strings.xml
Merge branch 'master' of git@github.com:j4velin/Pedometer.git
fixed isse: http://j4velin-systems.de/bugtracker/view.php?id=354
statistics more accurate
Merge pull request #5 from j4velin/master

Update version
Update spanish translations to last version
Merge pull request #28 from McGiverGim/master

Update spanish translation to latest version