Add norm for linking to live site

[gbinal]

When on the dashboard homepage, one workflow we don't readily support right now is getting straight to the actual project. Two ideas come to mind once there's a production site to link to for a project:

• Add a similar link above Code, Metrics, News to something like Live Site or Production Site that links to the main project website.
• Find an elegant way to include a screenshot of the site that we can link to it.