Getting pedant running with rspec 3

@mcquin I was able to get pedant running locally with these changes (although the tests don't all pass yet).  It also sends the output from the pedant subcommands to the current STDOUT.
Did you find a way to specify the server? Or find out this wasn't needed? (I, too, had a branch off of chef-pedant accepting a `--server` flag, so I'm curious.)