Fixes #613: portfolio preview message

This stuff was all surprisingly messy, and actually relied on an unclosed div to work correctly. :expressionless:

But this at least moves HTML that was in our server-side stuff into templates, and I think it looks reasonable.

<img src="http://f.cl.ly/items/0s2I0O1c1F2r3c0X470Q/Screen%20Shot%202013-03-07%20at%205.54.29%20PM%20%20%20%203-7-13.png" />
<img src="http://f.cl.ly/items/1x1J1P3g3v2t213I3S40/Screen%20Shot%202013-03-07%20at%205.54.35%20PM%20%20%20%203-7-13.png" />

Yes, I liked a page on localhost. Yes, my dad will probably ask me why he can't get to that url from his computer.