Minor tweaks to etl.py
Replace wget with curl to avoid Heroku buildpack sadness
Merge pull request #1 from daguar/replace-wget-with-curl

Replace wget with curl to avoid Heroku buildpack sadness
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  Replace wget with curl to avoid Heroku buildpack sadness
  Minor tweaks to etl.py