rails - Complete options for server subcommand
rails - Dynamic environment completion

Generate the list of available environments based on contents of
config/environments directory rather than hard-coding the list of normal
environments.
rails - Add completion for "new" subcommand

Add completion for "rails new" used for creating a new Rails
application.
Copyright and emacs vars for rails completion

Add copyright statement and emacs local variable block to _rails file to
follow contents of other completion files.