Duel WIP

Work in progress issue to track work to ship Duel updates.

- [ ] Change 'Literature' to 'Duel' on homepage
- [ ] Update Code examples on home page for Duel data
- [ ] Add 'Duel' section to `/submissions` with link to `/gallery`
- [ ] `/gallery` with a description / info of the duel gallery show in December, the video from the hackday, and the artists who made stuff