adds foreman and .env.example file
moves secret token into .env
moves ActionMailer config into .env
adds GMAIL_USERNAME to systemmailer
updates readme
adds email from address
Merge pull request #27 from robertjwhitney/config_to_env

Config to env
make more things configurable with .env and pull out deployment defaults
fix failing mail spec and safe_yaml warning
Merge pull request #35 from cantino/deployments

Extract more things into .env and pull out deployment defaults