Don't use SendGrid in test and dev environments.
Remove MailChimp credentials from codebase.

https://www.pivotaltracker.com/story/show/56291406
Try to enable log levels on Heroku.
Eliminate vendor/plugins deprecation warnings.
Keep .powrc in version control.

Even though there's nothing in it at present, to help me remember which
file goes in VC which doesn't.
Remove ANET sandbox key from repo.

https://www.pivotaltracker.com/story/show/56291406
Merge branch 'api-keys'