elo rank any list
- POST /lists
- GET /lists/:id
- start comparing
- see randomly ordered
- see ranked
- GET /lists/:id/comparisons/new
- POST /lists/:id/comparisons
- rank list
- authentication
- groups, orgs
- models
- lists
- name
- description (markdown)
- items
- list-id
- name
- description (markdown)
- score
- comparisons
- list-id?
- win-id
- lose-id
- created-at
- lists
- sidenav list enter/exit animations
- comparison
- rank order visualization
- html-webpack-plugin
- slack