Milo buildbot: Add in the rest of the blame/commits information.

milo/api/resp/build.go

Index: milo/api/resp/build.go
diff --git a/milo/api/resp/build.go b/milo/api/resp/build.go
index 5bae6fc67e322a62ded7d8f79b3acc7eb31335ed..c7bbd72082f92030efba4e75d59dd6cbf9c75bad 100644
--- a/milo/api/resp/build.go
+++ b/milo/api/resp/build.go
@@ -74,14 +74,16 @@ type Commit struct {
 	AuthorName string
 	// Email of the committer.
 	AuthorEmail string
+	// Time of the commit.
+	CommitTime time.Time
 	// Full URL of the main source repository.
 	Repo string
 	// Branch of the repo.
 	Branch string
 	// Requested revision of the commit or base commit.
-	RequestRevision string
+	RequestRevision *Link
 	// Revision of the commit or base commit.
-	Revision string
+	Revision *Link
 	// The commit message.
 	Description string
 	// The commit title, usually the first line of the commit message.