changed email fields with the email type and added required parameter on some stuff

src/Wallabag/CoreBundle/Form/Type/EntryType.php

@@ -10,7 +10,7 @@ class EntryType extends AbstractType
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
         $builder
-            ->add('url', 'url')
+            ->add('url', 'url', array('required' => true))
             ->add('save', 'submit')
         ;
     }

src/Wallabag/CoreBundle/Form/Type/ForgotPasswordType.php

@@ -20,6 +20,7 @@ class ForgotPasswordType extends AbstractType
     {
         $builder
             ->add('email', 'email', array(
+                'required' => true,
                 'constraints' => array(
                     new Constraints\Email(),
                     new Constraints\NotBlank(),

src/Wallabag/CoreBundle/Form/Type/NewUserType.php

@@ -11,7 +11,7 @@ class NewUserType extends AbstractType
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
         $builder
-            ->add('username', 'text')
+            ->add('username', 'text', array('required' => true))
             ->add('password', 'password', array(
                 'constraints' => array(
                     new Constraints\Length(array(
@@ -21,7 +21,7 @@ class NewUserType extends AbstractType
                     new Constraints\NotBlank(),
                 ),
             ))
-            ->add('email', 'text')
+            ->add('email', 'email')
             ->add('save', 'submit')
         ;
     }

src/Wallabag/CoreBundle/Form/Type/UserInformationType.php

@@ -10,8 +10,8 @@ class UserInformationType extends AbstractType
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
         $builder
-            ->add('name', 'text')
+            ->add('name', 'text', array('required' => true))
-            ->add('email', 'text')
+            ->add('email', 'email')
             ->add('save', 'submit')
         ;
     }