fix typo
create an activatable transformer classes

those are no-op by default
make ExtracfigureTransformer Activable
Merge branch 'car-template' (Matthias' latest and greatest.)
Added datetime access to Jinja
Fixed comment typo.
Added basic Sphinx template.

This template does not really inherit anything from the
base yet.  I'm no where near done with this.  It's just
a starting point.