Add tests and godebug to compare structs

vendor/github.com/kylelemons/godebug/pretty/doc.go

@@ -0,0 +1,25 @@
+// Copyright 2013 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 pretty pretty-prints Go structures.
+//
+// This package uses reflection to examine a Go value and can
+// print out in a nice, aligned fashion.  It supports three
+// modes (normal, compact, and extended) for advanced use.
+//
+// See the Reflect and Print examples for what the output looks like.
+package pretty
+
+// TODO:
+//   - Catch cycles