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/DeleteAction.php

@@ -0,0 +1,23 @@
+<?php namespace Flarum\Api\Actions\Discussions;
+
+use Flarum\Core\Commands\DeleteDiscussionCommand;
+use Flarum\Api\Actions\BaseAction;
+use Flarum\Api\Actions\ApiParams;
+
+class DeleteAction extends BaseAction
+{
+    /**
+     * Delete a discussion.
+     *
+     * @return Response
+     */
+    protected function run(ApiParams $params)
+    {
+        $discussionId = $params->get('id');
+
+        $command = new DeleteDiscussionCommand($discussionId, $this->actor->getUser());
+        $this->dispatch($command, $params);
+
+        return $this->respondWithoutContent();
+    }
+}