Address code review comments

Add some documentation.
Create new util.InitFlags() function to merge and parse in one step.

pkg/util/flags.go

@@ -0,0 +1,27 @@
+/*
+Copyright 2014 Google Inc. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util
+
+import (
+	flag "github.com/spf13/pflag"
+)
+
+// InitFlags normalizes and parses the command line flags
+func InitFlags() {
+	AddAllFlagsToPFlags()
+	flag.Parse()
+}