added roundness explaination in example 27

examples/network/27_world_cup_network.html

@@ -47,7 +47,7 @@ inheritColor option:
     <option value="to">to</option>
     <option value="false">false</option>
 </select><br/>
-Roundness (0..1): <input type="range" min="0" max="1" value="0.5" step="0.05" style="width:200px" id="roundnessSlider"> <input id="roundnessScreen" value="0.5">
+Roundness (0..1): <input type="range" min="0" max="1" value="0.5" step="0.05" style="width:200px" id="roundnessSlider"> <input id="roundnessScreen" value="0.5"> (0.5 is max roundness for continuous, 1.0 for the others)
 <br />
 Hide edges on drag: <input type="checkbox" checked="checked" id="hideEdgesOnDrag"><br/>
 Hide nodes on drag: <input type="checkbox"  id="hideNodesOnDrag">