This is the codebase behind my responsive apps with the lightning design system talk at the 2016 Salesforce1 World Tour in London.

Don't forget that Lightning Components requires My Domain, so you need to turn that on first.

While all the components are here and you can drop them into your Saleforce org, its easier (particularly where Lightning Components are concerned) to install the unmanaged package from :

https://login.salesforce.com/packaging/installPackage.apexp?p0=04t58000000QzoT

You can access the blog posts via the 'BlogHomeApp' Lightning component application, which will have a URL similar to

https://<your_domain>.lightning.force.com/c/BlogHomeApp.app

When you view the blog home app with no data, it will render a button that will allow you to create a couple of sample posts.

The the Small/Medium/Large Image Id fields need the id of a Document or the id of an Attachment (NOTE - not the new Files based attachments, but the old Attachment object itself).

To find out the Document id, click the View File link on the document page and grab the URL, e.g. :

https://kabtalks16-dev-ed--c.eu6.content.force.com/servlet/servlet.FileDownload?file=01558000000dSus

the id is everything after the file=, so in this case 01558000000dSus

Have fun!