Milo: Add current builds to buildbot builder view

milo/appengine/frontend/templates/buildbot/pages/builder.html

 {{define "title"}}Builder {{ .Builder.Name }}{{end}}
 
 {{define "head"}}{{end}}
 
 {{define "body"}}
 <h1>Builder {{.Builder.Name}}</h1>
 
 {{ if .Builder.CurrentBuilds }}
   <h2>Current Builds ({{len .Builder.CurrentBuilds}}):</h2>
   <ul>
   {{ range .Builder.CurrentBuilds }}
     <li>{{ .Link | linkify }}
+      {{ $nb := len .Blame }}
+      {{ if lt $nb 4 }}
+        {{ range $i, $c := .Blame }}
+          {{ if gt $i 0 }},{{ end }}
+          {{ if .Changelist }}
+            {{ .Changelist | linkify }}
+            {{ if .AuthorEmail }}
+              by {{ .AuthorEmail }}
+            {{ end }}
+          {{ else }}
+            (<a href="{{ .CommitURL }}">{{ .AuthorEmail }}</a>)
+          {{ end }}
+        {{ end }}
+      {{ else }}
+        ({{ $nb }} changes)
+      {{ end }}
       [Running for: {{ .ExecutionTime.Duration | humanDuration }}]
       {{ range .Text }} {{ . }}{{ end }}
     </li>
   {{ end }}
   </ul>
 {{ else }}
   <h2>No current builds</h2>
 {{ end }}
 
 {{ if .Builder.PendingBuilds }}
@@ skipping 76 matching lines @@
 
 (Show:
 <a href="{{.Builder.Name}}">default</a>
 <a href="{{.Builder.Name}}?limit=25">25</a>
 <a href="{{.Builder.Name}}?limit=50">50</a>
 <a href="{{.Builder.Name}}?limit=100">100</a>
 <a href="{{.Builder.Name}}?limit=200">200</a>
 )
 
 {{end}}