Use classes in favor of structs

Change-Id: I6ad2df70b7ad9b5fdc5baddc3ef85d0fed0c139c
Reviewed-on: http://codereview.qt.nokia.com/2518
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

src/plugins/git/gitsettings.h

@@ -43,8 +43,9 @@ namespace Git {
 namespace Internal {
 
 // Todo: Add user name and password?
-struct GitSettings
+class GitSettings
 {
+public:
     GitSettings();
 
     void fromSettings(QSettings *);