relax username validation (#413)

this commit allows for matching accented characters, dots, '@' symbol,
and other important things.

public/src/utils.js

@@ -94,7 +94,7 @@
 		},
 
 		isUserNameValid: function(name) {
-			return (name && name !== "" && (/^[a-zA-Z0-9 _-]+$/.test(name)));
+			return (name && name !== "" && (/^['"\s\-.*0-9\u00BF-\u1FFF\u2C00-\uD7FF\w]+$/.test(name)));
 		},
 
 		isPasswordValid: function(password) {

tests/utils.js

@@ -0,0 +1,12 @@
+var assert = require('assert'),
+	utils = require('./../public/src/utils.js');
+
+
+describe("Utility Methods", function(){
+	describe("username validation", function(){
+		it("accepts latin-1 characters", function(){
+			var username = "John\"'-. Doeäâèéë1234";
+			assert(utils.isUserNameValid(username), 'invalid username');
+		});
+	});
+});