Add carriage return to SMTP handshake

Every line in STMP traffic should end with a CRLF (not just a LF) according to http://cr.yp.to/docs/smtplf.html
Make fake smtp server adhere more strictly to SMTP protocol
Ensure logger level is always non-nil

Rails 4.1 dies terribly if the logger level is set to nil.
initial test of rails 4.1
leave logger.level as is in rails 4.1+
Merge branch 'patch-1' of https://github.com/mdh/health_check into crnl_on_smtp
Merge branch 'rails41' (tests) into redcanaryco-rails4.1-logger-fix

Adjust lib/health_check/health_check_controller.rb to check if @old_logger_level is set
Set SECRET_KEY_BASE to get rails 4.1 to run in production mode
Merge branch 'rails41' into redcanaryco-rails4.1-logger-fix
Merge branch 'master' into rails41

Conflicts:
	.travis.yml
Merge branch 'redcanaryco-rails4.1-logger-fix' into rails41
Merge branch 'crnl_on_smtp'