enable adding custom config widgets from a run control factory

To achieve this there are two methods in IRunControlFactory you
need to implement:

1) createRunConfigurationAspect returns a IRunConfigurationAspect
which stores the settings specific to your plugin.
2) createConfigurationWidget returns a RunConfigWidget that will
be shown in the project settings

Merge-request: 258
Reviewed-by: hjk <qtc-committer@nokia.com>

src/plugins/qt4projectmanager/qt-s60/s60manager.cpp

@@ -95,7 +95,7 @@ public:
         return m_name;
     }
 
-    QWidget *createConfigurationWidget(ProjectExplorer::RunConfiguration * /*runConfiguration */) {
+    ProjectExplorer::RunConfigWidget *createConfigurationWidget(ProjectExplorer::RunConfiguration *) {
         return 0;
     }