added a test for file_upload
got tests working!
remove ref to non-existent MR script
have test failures, not errors, when files aren't present
Merge pull request #605 from davidmarin/setup_regression_tests

setup regression tests
Merge branch 'master' of github.com:Yelp/mrjob into no_local_mrjob_bootstrap
fix failing local mode tests that required bootstrapping mrjob
removed unneccessary --no-bootstrap-mrjob from setup regression tests