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/Actions/TokenAction.php

@@ -0,0 +1,43 @@
+<?php namespace Flarum\Api\Actions;
+
+use Illuminate\Http\JsonResponse;
+use Illuminate\Contracts\Bus\Dispatcher;
+use Flarum\Core\Commands\GenerateAccessTokenCommand;
+use Flarum\Core\Repositories\UserRepositoryInterface;
+use Flarum\Api\Actions\BaseAction;
+
+class TokenAction extends BaseAction
+{
+    protected $users;
+
+    public function __construct(UserRepositoryInterface $users, Dispatcher $bus)
+    {
+        $this->users = $users;
+        $this->bus = $bus;
+    }
+
+    /**
+     * Log in and return a token.
+     *
+     * @return Response
+     */
+    public function run(ApiParams $params)
+    {
+        $identification = $params->get('identification');
+        $password = $params->get('password');
+
+        $user = $this->users->findByIdentification($identification);
+
+        if (! $user || ! $user->checkPassword($password)) {
+            return $this->respondWithError('invalidLogin', 401);
+        }
+
+        $command = new GenerateAccessTokenCommand($user->id);
+        $token = $this->dispatch($command, $params);
+
+        return new JsonResponse([
+            'token' => $token->id,
+            'userId' => $user->id
+        ]);
+    }
+}