Small library to send emails via Gmail SMTP server.

export MAILER_USERNAME=.........
export MAILER_PASSWORD=.........

go run main.go -from "[email protected]" -to "[email protected]" \
    -subject "test mailer" \
    -body "hello from command line"

• build - Builds binary to file path "bin/mailer"
• run_tests - Run Golang tests.
• test_coverage - Run Golang test converage.
• show_coverage - Run and displays html test coverage.
• cleanup - Removes temporary files.