Merge branch 'patch-2' of https://github.com/bjlbernal/c3 into bjlbernal-patch-2

c3.js

@@ -258,6 +258,7 @@
         // gauge
         var __gauge_label_show = getConfig(['gauge', 'label', 'show'], true),
             __gauge_label_format = getConfig(['gauge', 'label', 'format']),
+            __gauge_expand = getConfig(['gauge', 'expand'], true),
             __gauge_min = getConfig(['gauge', 'min'], 0),
             __gauge_max = getConfig(['gauge', 'max'], 100),
             __gauge_onclick = getConfig(['gauge', 'onclick'], function () {}),
@@ -2163,7 +2164,7 @@
         }
 
         function shouldExpand(id) {
-            return (isDonutType(id) && __donut_expand) || (isPieType(id) && __pie_expand);
+            return (isDonutType(id) && __donut_expand) || (isGaugeType(id) && __gauge_expand) || (isPieType(id) && __pie_expand);
         }
 
         //-- Color --//