Use http_url in Validator instead of url or else people can inject JavaScript.

public/register/index.html

@@ -32,8 +32,8 @@
       <middle>
         <label for="username">Username</label>
         <input id="username" name="username" placeholder="Username" type="text">
-        <label for="email">Email</label>
-        <input id="email" name="email" placeholder="Email" type="text">
+        <label for="email">FAKE! Email</label>
+        <input id="email" name="email" placeholder="fake@faker.com" type="text">
         <label for="password">Password</label>
         <input id="password" name="password" placeholder="Password" type="password">
       </middle>