added exclude function

src/app/services/graphite/gfunc.js

@@ -199,6 +199,13 @@ function (_) {
     defaultParams: [25]
   });
 
+  addFuncDef({
+    name: "exclude",
+    category: categories.Filter,
+    params: [ { name: "exclude", type: 'string' } ],
+    defaultParams: ['exclude']
+  });
+
   addFuncDef({
     name: 'highestCurrent',
     category: categories.Filter,