Use a PTY so hadoop lines are returned immediately
Merge branch 'master' of github.com:Yelp/mrjob into pty
made @thebigjc's patch more platform-independent, added tests
added @thebigjc to __credits__
cleaner way of handling PTY IOErrors
more precise naming
Merge pull request #602 from davidmarin/pty

Use a PTY so hadoop lines are returned immediately (replaces #580)