Replace 'by' with 'Last change by'.
Add .gems.dev and update .gems.
Merge pull request #3 from srabuini/email_link_to_ballot

Redirect to the requested URL after login
Add comment.message in email when user makes a comment.
Update comment_made.md.
Upgrade Shield to version 2.1.1.
Add New Relic monitoring.
Add newrelic.yml file.
Update README.
Add env.example.sh.
Link to ballot on user added email