api

- GET /uuid/:uuid
- skip verify_authenticity_token for POST /movies/
- POST movie with remote file urls
- ping callback url when conversion complete(web hook)
  - passing movie uuid

client implementation: https://github.com/shin1ohno/jani-converter_client/pull/1/files

---------------

@l15n please review
IMHO You should use `respond_to` here

e.g.

```ruby
respond_to do |format|
   format.json { respond_with @movie }
   format.html { redirect_to movies_path }
end
```