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)
Again, I'm not at all against the idea of having a way to add a link to a job page. You can go ahead and merge if you want.

From the engineering standpoint, this implementation gets the job done, but also bleeds some temporary placelocal assumptions into unrelated code. Now if strider branch changes, if you want to link to different page, if I want to link to something for my project, presumably in all those cases and more I have to modify and deploy changes to strider. This will be the bottleneck for making wider use of a good feature. By inverting the dependency you can eliminate the bottleneck.