Doesn't support engines that are installed from scoped packages

[shoebox639]

I have a private engine at @my-private-scope/aglio-theme-foo. When I do aglio -t foo, aglio is unable to find this module, because it's only looking for modules like this:

require('aglio-theme-' + theme)

where theme is foo in my case.

It would be nice to be able to take a whole module path as the template engine like:

aglio -t @my-private-scope/aglio-theme-foo

thanks

[filipemeneses]

That would allow a way more practical:

aglio -t ./path/to/theme