Added support for deploying to github.io

Rakefile

@@ -304,11 +304,11 @@ task :setup_github_pages, :repo do |t, args|
     repo_url = args.repo
   else
     puts "Enter the read/write url for your repository"
-    puts "(For example, 'git@github.com:your_username/your_username.github.com)"
+    puts "(For example, 'git@github.com:your_username/your_username.github.io)"
     repo_url = get_stdin("Repository url: ")
   end
   user = repo_url.match(/:([^\/]+)/)[1]
-  branch = (repo_url.match(/\/[\w-]+\.github\.com/).nil?) ? 'gh-pages' : 'master'
+  branch = (repo_url.match(/\/[\w-]+\.github\.(?:io|com)/).nil?) ? 'gh-pages' : 'master'
   project = (branch == 'gh-pages') ? repo_url.match(/\/([^\.]+)/)[1] : ''
   unless (`git remote -v` =~ /origin.+?octopress(?:\.git)?/).nil?
     # If octopress is still the origin remote (from cloning) rename it to octopress
@@ -328,7 +328,7 @@ task :setup_github_pages, :repo do |t, args|
       end
     end
   end
-  url = "http://#{user}.github.com"
+  url = "http://#{user}.github.io"
   url += "/#{project}" unless project == ''
   jekyll_config = IO.read('_config.yml')
   jekyll_config.sub!(/^url:.*$/, "url: #{url}")