Export Qt configuration in CTKConfig so that external project can use it

CTKConfig.cmake.in

@@ -125,6 +125,12 @@ SET(CTK_QTDESIGNERPLUGINS_DIR "@CTK_QTDESIGNERPLUGINS_DIR_CONFIG@")
 # CTK PythonQt install directory
 SET(CTK_PYTHONQT_INSTALL_DIR "@CTK_PYTHONQT_INSTALL_DIR_CONFIG@")
 
+# Qt configuration
+SET(CTK_QT_RCC_EXECUTABLE "@QT_RCC_EXECUTABLE@")
+SET(CTK_QT_MOC_EXECUTABLE "@QT_MOC_EXECUTABLE@")
+SET(CTK_QT_UIC_EXECUTABLE "@QT_UIC_EXECUTABLE@")
+SET(CTK_QT_QMAKE_EXECUTABLE "@QT_QMAKE_EXECUTABLE@")
+
 # The CTK version number
 SET(CTK_MAJOR_VERSION "@CTK_MAJOR_VERSION@")
 SET(CTK_MINOR_VERSION "@CTK_MINOR_VERSION@")