Movie Triggers

This is a continuation of https://github.com/duckduckgo/zeroclickinfo-spice/pull/1002. @b1ake do you think it's worth putting the triggers (or at least some of them) back? I'm having a hard time getting the movie IA to show up. For example, these don't work:

https://duckduckgo.com/?q=alien+movies
https://duckduckgo.com/?q=guardians+of+the+galaxy+movie