heroku_install: turn email on by default if DOMAIN and SMTP_SERVER set
heroku_install: turn email on by default if DOMAIN and SMTP_SERVER set

cgorringe/oscurrency,cgorringe/oscurrency,lazzarello/bk-tb-remote,lazzarello/bk-tb-remote,austintimeexchange/oscurrency,cgorringe/oscurrency,austintimeexchange/oscurrency