Added Changelog

CHANGELOG.markdown

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+# Octopress Changelog
+
+## 2.0
+
+- Now based on [mojombo/jekyll](http://github.com/mojombo/jekyll)
+- Sports a semantic HTML5 template
+- Easy theming with Compass and Sass
+- A Mobile friendly responsive (320 and up) layout
+- Built in 3rd party support for Twitter, Google Plus One, Disqus Comments, Pinboard, Delicious, and Google Analytics
+- Deploy to Github pages or use Rsync
+- Built in support for POW and Rack servers
+- Beautiful [Solarized](http://ethanschoonover.com/solarized) syntax highlighting
+- Super easy setup and configuration
+
+**New Plugins, Filters, & Generators**
+
+- **Gist Tag** for easily embedding gists in your posts
+- **Pygments Cache** makes subsequent compiling much faster
+- **Include Code Tag** lets you embed external code snippets from your file system and adds a download link
+- **Pullquote Tag** Generate beautiful semantic pullquotes (no double data) based on Maykel Loomans's [technique](http://miekd.com/articles/pull-quotes-with-html5-and-css/)
+- **Blockquote Tag** makes it easy to semantically format blockquotes
+- **Category Generator** gives you archive pages for each category
+- **Sitemap.xml Generator** for search engines
+
+## 1.0
+kkk
+- **No longer supported.**
+- Jekyll Matured, but Henrik's Jekyll fork did not.
+- Thanks for all your pull requests, I learned a lot.