Add variable `page.last_modified_at`; add site recent updates include file.

LICENSE

+The MIT License (MIT)
+
+Copyright (c) 2015 Leo Liang
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file

README.markdown

 # Jekyll Revision History Plugin
 
-Adds recent revision history to each page on Jekyll/Octopress site. 
+Page/post revision history for Jekyll/Octopress site. 
 
 Git is the only revision control system currently supported.  
 
+This plugin adds a page variable `page.revisions`, which is a list of recent revisions of the post or page. Each revision contains attributes `date`, `author` and `message`. A page variable `page.last_modified_at` is added as well, which equals to `page.revisions[0].date`. 
 
-This plugin adds a page variable `page.revisions`, which is a list of recent revisions of the post or page. Each revision contains attributes `date`, `author` and `message`. The sample template file `revision.html` shows how to use the variable.
+The sample template file `revision.html` and `recent_updated.html` shows how to use the variable.
 
-## Installation
+## Usage
 
 Put `revision.rb` in `/_plugins/` (for Jekyll) or `/plugins/` (for Octopress) directory. 
 
-Put `revision.html` in `/_include` (for Jekyll) or `/source/_include` (for Octopress) directory. Include it somewhere in your layout file:
+Put `revision.html` and `recent_updated.html` in `/_include` (for Jekyll) or `/source/_include` (for Octopress) directory. 
+
+### Revision History
+
+Include `revision.html` somewhere in your layout file:
 
 	{% include revision.html %}
 
-You may modify `revision.html` to get the presentation you want.
+It lists the revision history of the current post/page. You may modify `revision.html` to get the presentation you want.
+
+### Recent Updates
+
+Include `recent_updated.html` somewhere in your layout file:
+
+	{% include recent_updated.html %}
+
+It lists 10 most recent updated pages and posts in your site. You may modify `recent_updated.html` to get the presentation you want.
+
 
 ## Configuration
 

plugins/revision.rb

@@ -11,6 +11,7 @@ module Jekyll
         %w(posts pages docs_to_write).each do |type|
           site.send(type).each do |item|
             item.data['revisions'] = GitLogger.new(site.source, item.path, site.config['revision']).revisions
+            item.data['last_modified_at'] = item.data['revisions'][0]['date']
           end
         end
       end

source/_includes/recent_updated.html

+<ul>
+{% assign recentPages = site.pages | sort: 'last_modified_at' | reverse %}
+{% for page in recentPages limit:10 %}
+  <li>
+    <a href="{{ page.url }}">{{ page.title }}</a>
+  </li>
+{% endfor %}
+</ul>