[Cairo] format for api docs

[Carl Worth]

On Oct 14, Thomas Hunger wrote:
 > > Finally, Keith already has a tutorial that he has presented a couple
 > > of times in a slide-show format. It would make a good starting point
 > > for someone wanting to make a tutorial manual.
 > do you mean the ols paper?

The OLS paper served as the basis, but the tutorial expands on it
significantly. Keith, are those slides available publicly somewhere
yet?

-Carl