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/Discussions/CreateAction.php

@@ -0,0 +1,41 @@
+<?php namespace Flarum\Api\Actions\Discussions;
+
+use Flarum\Core\Commands\StartDiscussionCommand;
+use Flarum\Core\Commands\ReadDiscussionCommand;
+use Flarum\Api\Actions\BaseAction;
+use Flarum\Api\Actions\ApiParams;
+use Flarum\Api\Serializers\DiscussionSerializer;
+
+class CreateAction extends BaseAction
+{
+    /**
+     * Start a new discussion.
+     *
+     * @return Response
+     */
+    protected function run(ApiParams $params)
+    {
+        // By default, the only required attributes of a discussion are the
+        // title and the content. We'll extract these from the rbaseequest data
+        // and pass them through to the StartDiscussionCommand.
+        $title = $params->get('discussions.title');
+        $content = $params->get('discussions.content');
+        $user = $this->actor->getUser();
+
+        $command = new StartDiscussionCommand($title, $content, $user, app('flarum.forum'));
+        $discussion = $this->dispatch($command, $params);
+
+        // After creating the discussion, we assume that the user has seen all
+        // of the posts in the discussion; thus, we will mark the discussion
+        // as read if they are logged in.
+        if ($user->exists) {
+            $command = new ReadDiscussionCommand($discussion->id, $user, 1);
+            $this->dispatch($command, $params);
+        }
+
+        $serializer = new DiscussionSerializer(['posts']);
+        $document = $this->document()->setPrimaryElement($serializer->resource($discussion));
+
+        return $this->respondWithDocument($document);
+    }
+}