I'm sorry for any users, but I simply did not have the continued time & interest in maintaining this Atom package and keeping it running on newer versions of Atom. If you're interested, please continue where I left off.
As an alternative, you might want to check out this package: script
Press Cmd+Ctrl+R on any open editor to run the currently open tab's content via node.js' exec.
Output will be displayed in a new pane. STDERR and execution errors will appear in red. Make sure to include a shebang so your shell knows how to run the file.
Run, Code, Run! will check your file's permissions to see if it's executable by you. If it isn't, it will make the file executable for you.