Add v3 dynamic cert template and logic

@jrbl - Stanford Fancy SoA changes

Includes fancy autoscale and centering code.

![stanford_soa](https://cloud.githubusercontent.com/assets/3364609/5308628/e1473810-7bcd-11e4-9d49-cae2b9af24cb.png)

Maybe a one-line comment noting that we're vertically centering? Though that's way more obvious in this case than in the other placement calculations... :-) What's less clear is the 1/5 fontsize nudge upwards. I'm guessing that's to deal with leading drift as the font scales? Maybe a comment would help clarify that too.