Add airframe icons

Tools/airframes.xml

@@ -1,11 +1,11 @@
 <?xml version='1.0' encoding='UTF-8'?>
 <airframes>
   <version>1</version>
-  <airframe_group name="StandardPlane">
+  <airframe_group name="StandardPlane" image="AirframeStandardPlane.png">
   	<airframe name="Multiplex Easystar 1/2" id="2100"/>
   	<airframe name="Generic AERT" id="2101"/>
   </airframe_group>
-  <airframe_group name="QuadRotorX">
+  <airframe_group name="QuadRotorX" image="AirframeQuadRotorX.png">
   	<airframe name="Generic 10 inch Quad" id="4001"/>
   	<airframe name="DJI F330 8 inch Quad" id="4010"/>
   	<airframe name="DJI F450 10 inch Quad" id="4011"/>