CD-18 Expose aws box url

@vasili-zolotov @d3ming 

This creates a link to the aws box that's created during ci. Right now it uses the users github icon as the button, but this can be changed later with a real icon. (I didn't want to take a stab at art)
OK, I get this, but this making some rather specific assumptions. This will not work for all of today's projects. I like the idea and the utility of this, but we'll need to alter the approach so that it scales for various situations.

 Could you grab the domain name name by matching against a pattern in the job's console output?