add another caller to ignore finding template path

We're trying to find the place where the template is being instantiated,
so we need to ignore all the Moo-y stuff in the middle.
get themes from Statocles share dir

This makes it a lot easier to use the default themes.

In the future, we may include a way to get any dist's share dir, so that
other CPAN dists can bundle Statocles themes.

Fixes #33