Add an About dialog for Cura

qml/AboutDialog.qml

@@ -0,0 +1,24 @@
+import QtQuick 2.2
+import QtQuick.Controls 1.1
+import QtQuick.Layouts 1.1
+import QtQuick.Window 2.1
+
+import UM 1.0 as UM
+
+UM.Dialog {
+    id: base
+
+    //: Add Printer dialog title
+    title: qsTr("About Cura");
+
+    Label {
+        text: "Cura";
+    }
+
+    rightButtons: Button {
+        text: "Close";
+
+        onClicked: base.visible = false;
+    }
+}
+