Rename gridcontrol.xml to gridcontrol.xml.dist

gridcontrol.xml changes backend, this is not intended. But the file should stay as example

Author: Schrank

…ireGento/GridControl/etc/gridcontrol.xml …nto/GridControl/etc/gridcontrol.xml.distsrc/app/code/community/FireGento/GridControl/etc/gridcontrol.xml renamed to src/app/code/community/FireGento/GridControl/etc/gridcontrol.xml.dist src/app/code/community/FireGento/GridControl/etc/gridcontrol.xml renamed to src/app/code/community/FireGento/GridControl/etc/gridcontrol.xml.dist

@@ -86,4 +86,4 @@
             </shipping_description>
         </sales_order_grid>
     </grids>
-</gridcontrol>
+</gridcontrol>