Project Wizards: Introduce notion of project directory, polish.

- Introduce project directory and "use" flag to file manager, use that
  in new item dialog
- Add configuration under Project settings, rename it to "General"
- Make wizards create project names as "untitled1.."
- Remove modules page from Qt application wizards (parametrizable)
- Give Utils::ProjectIntroPage a "Set as default location" toggle.
- Introduce wizard dialog base classes for handling that.
- Introduce notion of "last visited directory to file manager" for
  open and non-project wizards, route open through file manager.
- Clean out QmlAppWizard

Task-number: QTCREATORBUG-333
Rubber-stamped-by: con <qtc-committer@nokia.com>

src/plugins/qt4projectmanager/wizards/emptyprojectwizard.cpp

@@ -31,8 +31,6 @@
 
 #include "emptyprojectwizarddialog.h"
 
-#include <utils/pathchooser.h>
-
 namespace Qt4ProjectManager {
 namespace Internal {
 
@@ -48,7 +46,8 @@ QWizard *EmptyProjectWizard::createWizardDialog(QWidget *parent,
                                               const WizardPageList &extensionPages) const
 {
     EmptyProjectWizardDialog *dialog = new EmptyProjectWizardDialog(name(), icon(), extensionPages, parent);
-    dialog->setPath(defaultPath.isEmpty() ? Utils::PathChooser::homePath() : defaultPath);
+    dialog->setPath(defaultPath);
+    dialog->setName(EmptyProjectWizardDialog::projectName(defaultPath));
     return dialog;
 }