Required files
celluloid/io/version
celluloid
celluloid/io/dns_resolver
celluloid/io/mailbox
celluloid/io/reactor
celluloid/io/socket
celluloid/io/stream
celluloid/io/tcp_server
celluloid/io/tcp_socket
celluloid/io/udp_socket
celluloid/io/unix_server
celluloid/io/unix_socket
celluloid/io/ssl_server
celluloid/io/ssl_socket