Send email with esp8266/Arduino, smtp auth and ssl support.

Examples:

ssl:
SendEmail e("mail.example.com", 465, "login", "password", 5000, true);
e.send("[email protected]", "[email protected]", "subject", "message");

plain no auth:
SendEmail e("mail.example.com", 25, "", "", 5000, false);
e.send("[email protected]", "[email protected]", "subject", "message");