gettingStarted, part 3-5: sanitize parameter names and compile fix

Change-Id: I12795439de71a41728f98b3d3438324664b27a0f
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

examples/tutorials/gettingStarted/gsQt/part3/main.cpp

@@ -83,9 +83,9 @@ void Notepad::quit()
         qApp->quit();
 }
 
-int main(int argv, char **args)
+int main(int argc, char **argv)
 {
-    QApplication app(argv, args);
+    QApplication app(argc, argv);
 
     Notepad notepad;
     notepad.show();

examples/tutorials/gettingStarted/gsQt/part3/part3.pro

@@ -1,4 +1,5 @@
 
+QT += widgets
 SOURCES = main.cpp
 
 # install

examples/tutorials/gettingStarted/gsQt/part4/main.cpp

@@ -94,9 +94,9 @@ void Notepad::save()
 
 }
 
-int main(int argv, char **args)
+int main(int argc, char **argv)
 {
-    QApplication app(argv, args);
+    QApplication app(argc, argv);
 
     Notepad notepad;
     notepad.show();

examples/tutorials/gettingStarted/gsQt/part4/part4.pro

@@ -1,4 +1,5 @@
 
+QT += widgets
 SOURCES = main.cpp
 
 # install

examples/tutorials/gettingStarted/gsQt/part5/main.cpp

@@ -120,9 +120,9 @@ void Notepad::save()
     }
 }
 
-int main(int argv, char **args)
+int main(int argc, char **argv)
 {
-    QApplication app(argv, args);
+    QApplication app(argc, argv);
 
     Notepad notepad;
     notepad.show();

examples/tutorials/gettingStarted/gsQt/part5/part5.pro

@@ -1,4 +1,5 @@
 
+QT += widgets
 SOURCES = main.cpp
 
 # install