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.
Octopress init
Site updated at 2014-09-22 11:04:00 UTC
Site updated at 2014-09-23 08:53:43 UTC
updated compass
enable wildcard of rm_rf
Merge pull request #1658 from kamatari/fix-rake-clean

enable wildcard of rm_rf
Merge pull request #1331 from Darkhogg/patch-1

Fixed setup_github_pages failing and not properly writing url to _config.yml
Octopress init
Site updated at 2014-10-28 08:35:49 UTC
Site updated at 2014-10-28 08:39:22 UTC
Merge branch 'master' of https://github.com/highjack/highjack.github.io

Conflicts:
	atom.xml
	sitemap.xml
	stylesheets/screen.css
Site updated at 2014-10-28 08:41:22 UTC
Site updated at 2014-10-28 08:47:04 UTC
Site updated at 2014-10-28 13:28:04 UTC
Site updated at 2014-10-28 13:33:03 UTC
Site updated at 2014-10-28 13:49:30 UTC
Site updated at 2014-10-28 13:51:05 UTC