Implement qml tab settings

Change-Id: I0b7365b5b3d7538f2b4a8c5eaff3420f448dd5be
Reviewed-on: http://codereview.qt.nokia.com/99
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Christian Kamm <christian.d.kamm@nokia.com>

src/plugins/qmljstools/qmljstoolsplugin.h

@@ -45,6 +45,9 @@ class QDir;
 QT_END_NAMESPACE
 
 namespace QmlJSTools {
+
+class QmlJSToolsSettings;
+
 namespace Internal {
 
 class ModelManager;
@@ -66,6 +69,7 @@ public:
 
 private:
     ModelManager *m_modelManager;
+    QmlJSToolsSettings *m_settings;
 
     static QmlJSToolsPlugin *m_instance;
 };