Rubocop config file

[jherrlin]

I wanna use rubocop-emacs for my daily Ruby on Rails development. Is there a way to point at a rubocop config file when running the interactive functions?

[jherrlin]

I wrote a way to handle this and made a PR here #28

[jherrlin]

"RuboCop would normally pick up the right configuration file anyways, as we're running it after cding to the appropriate directory."