Failing test for symlinks

/cc @matthew-andrews 

Leaving this here as a failing test for following symlinks in partials dir. It's fixed in my fork of express-handlebars, which I've put in a PR for:
    "express-handlebars": "adgad/express-handlebars#follow-symlinks",

https://github.com/ericf/express-handlebars/pull/98/files