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/coreplugin/filemanager.h

@@ -79,6 +79,10 @@ public:
     // helper methods
     static QString fixFileName(const QString &fileName);
 
+    QStringList getOpenFileNames(const QString &filters,
+                                 const QString path = QString(),
+                                 QString *selectedFilter = 0);
+
     QString getSaveFileNameWithExtension(const QString &title, const QString &path,
                                     const QString &fileFilter, const QString &extension);
     QString getSaveAsFileName(IFile *file);
@@ -90,6 +94,18 @@ public:
                                      const QString &alwaysSaveMessage = QString::null,
                                      bool *alwaysSave = 0);
 
+
+    QString fileDialogLastVisitedDirectory() const;
+    void setFileDialogLastVisitedDirectory(const QString &);
+
+    QString fileDialogInitialDirectory() const;
+
+    bool useProjectsDirectory() const;
+    void setUseProjectsDirectory(bool);
+
+    QString projectsDirectory() const;
+    void setProjectsDirectory(const QString &);
+
 signals:
     void currentFileChanged(const QString &filePath);