Added example to the README

Sven Axelsson · Sven Axelsson · commit a8097c6364b0 · 2016-05-23T13:34:06.000+02:00
diff --git a/README.md b/README.md
@@ -52,6 +52,15 @@ XML Syntax
                 </add>
             </column>
 
+            <manufacturer>
+                <add>
+                    <header>Manufacturer</header>
+                    <type>options</type>
+                    <index>manufacturer</index>
+                    <options>firegento_gridcontrol/utility::getDropdownAttributeLabelOptionArray(manufacturer)</options>
+                </add>
+            </manufacturer>
+
             <selecttest>
                 <add>
                     <header>Status Column</header>
@@ -74,4 +83,4 @@ XML Syntax
         </gridname>
     </grids>
 </gridcontrol>
-``````
+``````
