added missing pyramid_mako to the pyramid examples

[gutomaia]

Pyramid mako, nowadays, is an external dependency renderer for Pyramid. We should include it on the setup.py and in the configuration of the example.

[abourget]

wanna become maintainer of this project? There's a bunch of PRs to be analyzed and merged, wanna step up ?

[kennedyshead]

Could you do a rebase so I can merge this?

[gutomaia]

Sure, just gimme a day!