Move the plugin examples to subdir of pluginhowto.

doc/pluginhowto/examples/wizard/customproject/customprojectplugin.cpp

@@ -0,0 +1,37 @@
+#include "customprojectplugin.h"
+#include "customprojectwizard.h"
+
+#include <QtPlugin>
+#include <QStringList>
+
+CustomProjectPlugin::CustomProjectPlugin()
+{
+    // Do nothing
+}
+
+CustomProjectPlugin::~CustomProjectPlugin()
+{
+    // Do notning
+}
+
+void CustomProjectPlugin::extensionsInitialized()
+{
+    // Do nothing
+}
+
+bool CustomProjectPlugin::initialize(const QStringList& args, QString *errMsg)
+{
+    Q_UNUSED(args);
+    Q_UNUSED(errMsg);
+
+    addAutoReleasedObject(new CustomProjectWizard);
+
+    return true;
+}
+
+void CustomProjectPlugin::shutdown()
+{
+    // Do nothing
+}
+
+Q_EXPORT_PLUGIN(CustomProjectPlugin)