Repaired email sending, implement password reset

Closes #288
* I use SendGrid for sending the emails, and it works fine (provided you supply the correct credentials in `config.mail` in `config.js`)
* Generates a random 12 char long alphanumeric password, replaces user's pw, and sends an email about it.

ghost/admin/router.js

@@ -14,7 +14,8 @@
             'debug/'           : 'debug',
             'register/'        : 'register',
             'signup/'          : 'signup',
-            'signin/'          : 'login'
+            'signin/'          : 'login',
+            'forgotten/'       : 'forgotten'
         },
 
         signup: function () {
@@ -25,6 +26,10 @@
             Ghost.currentView = new Ghost.Views.Login({ el: '.js-login-container' });
         },
 
+        forgotten: function () {
+            Ghost.currentView = new Ghost.Views.Forgotten({ el: '.js-login-container' });
+        },
+
         blog: function () {
             var posts = new Ghost.Collections.Posts();
             posts.fetch({ data: { status: 'all', orderBy: ['updated_at', 'DESC'] } }).then(function () {

ghost/admin/tpl/forgotten.hbs

@@ -0,0 +1,9 @@
+<form id="forgotten" method="post" novalidate="novalidate">
+    <div class="email-wrap">
+        <input class="email" type="email" placeholder="Email Address" name="email" autocapitalize="off" autocorrect="off">
+    </div>
+    <button class="button-save" type="submit">Send new password</button>
+    <section class="meta">
+        <a href="/ghost/login/">Log in</a>
+    </section>
+</form>

ghost/admin/tpl/login.hbs

@@ -7,6 +7,6 @@
     </div>
     <button class="button-save" type="submit">Log in</button>
     <section class="meta">
-        <a class="forgotten-password" href="#">Forgotten password?</a> &bull; <a href="/ghost/signup/">Register new user</a>
+        <a class="forgotten-password" href="/ghost/forgotten/">Forgotten password?</a> &bull; <a href="/ghost/signup/">Register new user</a>
     </section>
 </form>

ghost/admin/views/login.js

@@ -109,4 +109,38 @@
             });
         }
     });
+
+    Ghost.Views.Forgotten = Ghost.SimpleFormView.extend({
+
+        templateName: "forgotten",
+
+        events: {
+            'submit #forgotten': 'submitHandler'
+        },
+
+        submitHandler: function (event) {
+            event.preventDefault();
+
+            var email = this.$el.find('.email').val();
+
+            $.ajax({
+                url: '/ghost/forgotten/',
+                type: 'POST',
+                data: {
+                    email: email
+                },
+                success: function (msg) {
+
+                    window.location.href = msg.redirect;
+                },
+                error: function (xhr) {
+                    Ghost.notifications.addItem({
+                        type: 'error',
+                        message: Ghost.Views.Utils.getRequestErrorMessage(xhr),
+                        status: 'passive'
+                    });
+                }
+            });
+        }
+    });
 }());