Wizards: allows filtering of wizards based on Qt version

Every wizard now implements requiredFeatures() to define a feature set.
If the feature set is not satisfied by the available Qt Versions,
the wizard is not shown in the create file/project dialog.

Every Qt version can define the provided feature set in availableFeatures()
defined in BaseQtVersion.

Change-Id: Ie9e2c210d19187b2296451948c36d274f2096623
Reviewed-by: Daniel Teske <daniel.teske@nokia.com>
Reviewed-by: Alessandro Portale <alessandro.portale@nokia.com>

src/plugins/qt4projectmanager/wizards/consoleappwizard.cpp

@@ -37,6 +37,7 @@
 
 #include <projectexplorer/projectexplorerconstants.h>
 #include <cpptools/abstracteditorsupport.h>
+#include <qtsupport/qtsupportconstants.h>
 
 #include <QtGui/QIcon>
 #include <QtCore/QFileInfo>
@@ -107,5 +108,10 @@ Core::GeneratedFiles
     return Core::GeneratedFiles() <<  source << profile;
 }
 
+Core::FeatureSet ConsoleAppWizard::requiredFeatures() const
+{
+    return Core::Feature(QtSupport::Constants::FEATURE_GENERIC_CPP_ENTRY_POINT);
+}
+
 } // namespace Internal
 } // namespace Qt4ProjectManager