Change references from Uranium to Cura

resources/qml/Preferences/ReadOnlySpinBox.qml

@@ -1,5 +1,5 @@
 // Copyright (c) 2016 Ultimaker B.V.
-// Uranium is released under the terms of the AGPLv3 or higher.
+// Cura is released under the terms of the AGPLv3 or higher.
 
 import QtQuick 2.1
 import QtQuick.Controls 1.1

resources/qml/Preferences/ReadOnlyTextArea.qml

@@ -1,5 +1,5 @@
 // Copyright (c) 2016 Ultimaker B.V.
-// Uranium is released under the terms of the AGPLv3 or higher.
+// Cura is released under the terms of the AGPLv3 or higher.
 
 import QtQuick 2.1
 import QtQuick.Controls 1.1

resources/qml/Preferences/ReadOnlyTextField.qml

@@ -1,5 +1,5 @@
 // Copyright (c) 2016 Ultimaker B.V.
-// Uranium is released under the terms of the AGPLv3 or higher.
+// Cura is released under the terms of the AGPLv3 or higher.
 // Different than the name suggests, it is not always read-only.
 
 import QtQuick 2.1

resources/qml/Preferences/SettingVisibilityPage.qml

@@ -1,5 +1,5 @@
 // Copyright (c) 2016 Ultimaker B.V.
-// Uranium is released under the terms of the AGPLv3 or higher.
+// Cura is released under the terms of the AGPLv3 or higher.
 
 import QtQuick 2.1
 import QtQuick.Controls 1.1