Make Film#frames lazy to reduce memory usage when processing asciicast
Make Film#frames lazy to reduce memory usage when processing asciicast

asciinema/asciinema.org,SunDi3yansyah/asciinema.org,asciinema/asciinema.org,asciinema/asciinema.org,SunDi3yansyah/asciinema.org,SunDi3yansyah/asciinema.org,asciinema/asciinema.org,asciinema/asciinema-server,asciinema/asciinema-server,SunDi3yansyah/asciinema.org,SunDi3yansyah/asciinema.org,asciinema/asciinema-server,asciinema/asciinema-server