ChangeScreen2: Show inline comments in history

When a history comment is expanded include the inline comments written
on that revision by the author at the same timestamp.  This makes it
easier to follow a change's evolution over time, especially if the
reader is new to the change and does not have the entire email thread
in their inbox.

Bug: issue 93
Change-Id: I57fe29fea2b3651306ff0a58746cefcfe1669267

gerrit-gwtui/src/main/java/com/google/gerrit/client/change/FileComments.ui.xml

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Copyright (C) 2013 The Android Open Source Project
+
+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.
+-->
+<ui:UiBinder
+    xmlns:ui='urn:ui:com.google.gwt.uibinder'
+    xmlns:c='urn:import:com.google.gerrit.client'
+    xmlns:g='urn:import:com.google.gwt.user.client.ui'>
+  <ui:style>
+    .box {
+    }
+    .path {
+      display: block;
+      white-space: nowrap;
+    }
+    .comments {
+      margin-left: 1em;
+    }
+  </ui:style>
+
+  <g:HTMLPanel styleName='{style.box}'>
+    <g:Anchor styleName='{style.path}' ui:field='path'/>
+    <g:FlowPanel styleName='{style.comments}' ui:field='comments'/>
+  </g:HTMLPanel>
+</ui:UiBinder>