start of new blog post

 On branch content

	modified:   app/public/sitemap.xml
	new file:   content/blogs/web_development/how_to_do_clean_mac_os_x_install_mountain_lion.md
	modified:   content/blogs/web_development/index.md
blog post: clean OS X install

 On branch content

	modified:   content/blogs/web_development/how_to_do_clean_mac_os_x_install_mountain_lion.md
minor content cleanup

 On branch master

	modified:   app/templates/article.html
	modified:   app/templates/base.html