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/coreplugin/coreplugin.pro

@@ -95,7 +95,8 @@ SOURCES += mainwindow.cpp \
     mimetypesettings.cpp \
     dialogs/promptoverwritedialog.cpp \
     fileutils.cpp \
-    textfile.cpp
+    textfile.cpp \
+    featureprovider.cpp
 
 HEADERS += mainwindow.h \
     editmode.h \
@@ -192,7 +193,8 @@ HEADERS += mainwindow.h \
     fileutils.h \
     externaltoolmanager.h \
     textfile.h \
-    generatedfile.h
+    generatedfile.h \
+    featureprovider.h
 
 FORMS += dialogs/newdialog.ui \
     actionmanager/commandmappings.ui \