Fix requirement of image_tag in zoomable_image_tag
Add Mike Metral as contributor
Mike Metral blog post on boot.rackspace.com
Mike Metral blog post on qcow to vhd conversion
Remove date from images dir
Merge pull request #216 from metral/metral_blogs

Jekyll Fix, Add Mike Metral as contributor, boot.rackspace.com blog post, qcow->vhd blog post