[milo] Add BuildSummary and common models.

milo/appengine/backend/git/gitiles.go

 // Copyright 2016 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package git
 
 import (
         "encoding/json"
         "fmt"
         "net/http"
@@ skipping 95 matching lines @@
         // TODO(hinoka): If there is a page and we have gotten less than the limit,
         // keep making requests for the next page until we have enough commits.
 
         // Move things into our own datastructure.
         result := make([]resp.Commit, len(commits.Log))
         for i, log := range commits.Log {
                 result[i] = resp.Commit{
                         AuthorName:  log.Author.Name,
                         AuthorEmail: log.Author.Email,
                         Repo:        repoURL,
-                        Revision: &resp.Link{
-                                Label: log.Commit,
-                                URL:   repoURL + "/+/" + log.Commit,
-                        },
+                        Revision:    resp.NewLink(log.Commit, repoURL+"/+/"+log.Commit),
                         Description: log.Message,
                         Title:       strings.SplitN(log.Message, "\n", 2)[0],
                         // TODO(hinoka): Fill in the rest of resp.Commit and add those details
                         // in the html.
                 }
         }
         return result, nil
 }