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
Update list of checks, and ruby versions tested
Fix homepage link and update versions tested
Update requirements
move user wide git ignores to a user global file
Fix "DEPRECATION WARNING: Disabling sessions for a single controller has been deprecated. Sessions are now lazy loaded. So if you don't access them, consider them off." message
Bump version and note how to contribute
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
Set specific rbx since generic is no longer present
Merge branch 'master' into rails41

Conflicts:
	.travis.yml
Merge branch 'redcanaryco-rails4.1-logger-fix' into rails41
Merge branch 'crnl_on_smtp'
Advance version, update README