handling cases where no callback is passed to emailer.send

src/emailer.js

@@ -20,6 +20,7 @@ var	fs = require('fs'),
 	};
 
 	Emailer.send = function(template, uid, params, callback) {
+		if (!callback) { callback = function() {}; }
 		if (!app) {
 			winston.warn('[emailer] App not ready!');
 			return callback();