re #58 - removed site.url everywhere (or replaced with: "/") and renamed site.site_url to site.url
re #58 - Added description metadata
Merge branch 'feature/58-opengraph' of github.com:timble/www.timble.net into feature/58-opengraph

Conflicts:
	_config.yml
	_includes/header.html
	blog.xml
re #58 - Fixed merge conflict
Merge branch 'feature/58-opengraph' into gh-pages