Fixed blog_url not returning & rake setup_github_pages failing

When executing `rake setup_github_pages`, an error tells that `url` don't exist. The reference to that variable has been changed to a call to `blog_url`.

The function `blog_url` was not returning anything, failing to properly write the `_config.yml` file. It now does return what should have.
Fixed blog_url when user contains uppercase letters
Made blog_url becalled just once...

...and stored in the `url` variable.
Reversed update_style copy direction to correctly restore the sass.old/custom files to the new sass/custom folder
Fix typo in update_style copy command
Octopress init
Site updated at 2014-02-20 15:12:49 UTC
Site updated at 2014-02-20 15:21:20 UTC
Site updated at 2014-02-20 16:51:20 UTC
Site updated at 2014-02-21 14:08:19 UTC
Site updated at 2014-02-21 16:41:43 UTC
Site updated at 2014-02-21 16:44:42 UTC
Site updated at 2014-02-23 12:02:42 UTC
Ignore protocol relative '//' urls.
Removed accidental call to expand_url
Fixed the expand_url filter. Finally.

Thanks @larryprice
Site updated at 2014-02-26 16:39:36 UTC
Site updated at 2014-02-28 17:46:47 UTC
gist_plugin: Handle multiple redirects, stopping if we find a circular reference
Site updated at 2014-03-03 17:25:24 UTC