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 2014-09-12 12:29:51 UTC
Site updated at 2014-09-12 12:32:48 UTC
Site updated at 2014-09-12 12:46:00 UTC
Site updated at 2014-10-02 14:42:48 UTC
enable wildcard of rm_rf
Merge pull request #1658 from kamatari/fix-rake-clean

enable wildcard of rm_rf
Site updated at 2014-10-15 12:42:53 UTC
Merge pull request #1331 from Darkhogg/patch-1

Fixed setup_github_pages failing and not properly writing url to _config.yml
Merge branch 'source' of github.com:fluxusfrequency/fluxusfrequency.github.io into source
Merge branch 'master' of github.com:fluxusfrequency/fluxusfrequency.github.io into source
add early november engine yard posts