Upgrade to L5 + huge refactor + more. closes #2

New stuff:
- Signup + email confirmation.
- Updated authentication strategy with remember cookies. closes #5
- New search system with some example gambits! This is cool - check out
the source. Fulltext drivers will be implemented as decorators
overriding the EloquentPostRepository’s findByContent method.
- Lay down the foundation for bootstrapping the Ember app.
- Update Web layer’s asset manager to properly publish CSS/JS files.
- Console commands to run installation migrations and seeds.

Refactoring:
- New structure: move models, repositories, commands, and events into
their own namespaces, rather than grouping by entity.
- All events are classes.
- Use L5 middleware and command bus implementations.
- Clearer use of repositories and the Active Record pattern.
Repositories are used only for retrieval of ActiveRecord objects, and
then save/delete operations are called directly on those ActiveRecords.
This way, we don’t over-abstract at the cost of Eloquent magic, but
testing is still easy.
- Refactor of Web layer so that it uses the Actions routing
architecture.
- “Actor” concept instead of depending on Laravel’s Auth.
- General cleanup!

src/Api/Serializers/UserBasicSerializer.php

@@ -0,0 +1,50 @@
+<?php namespace Flarum\Api\Serializers;
+
+use Flarum\Core\Models\User;
+
+class UserBasicSerializer extends BaseSerializer
+{
+    /**
+     * The name to use for Flarum events.
+     * @var string
+     */
+    protected static $eventName = 'UserBasic';
+
+    /**
+     * The resource type.
+     * @var string
+     */
+    protected $type = 'users';
+
+    /**
+     * Serialize attributes of a User model for JSON output.
+     *
+     * @param User $user The User model to serialize.
+     * @return array
+     */
+    protected function attributes(User $user)
+    {
+        $attributes = [
+            'id'        => (int) $user->id,
+            'username'  => $user->username,
+            'avatarUrl' => $user->avatar_url
+        ];
+
+        return $this->attributesEvent($user, $attributes);
+    }
+
+    /**
+     * Get the URL templates where this resource and its related resources can
+     * be accessed.
+     *
+     * @return array
+     */
+    protected function href()
+    {
+        $href = [
+            'users' => $this->action('UsersController@show', ['id' => '{users.id}'])
+        ];
+
+        return $this->hrefEvent($href);
+    }
+}