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/Core/Support/Actor.php

@@ -0,0 +1,19 @@
+<?php namespace Flarum\Core\Support;
+
+use Flarum\Core\Models\User;
+use Flarum\Core\Models\Guest;
+
+class Actor
+{
+    protected $user;
+
+    public function getUser()
+    {
+        return $this->user ?: new Guest;
+    }
+
+    public function setUser(User $user)
+    {
+        $this->user = $user;
+    }
+}

src/Core/Support/DispatchesEvents.php

@@ -0,0 +1,16 @@
+<?php  namespace Flarum\Core\Support;
+
+trait DispatchesEvents
+{
+    /**
+     * Dispatch all events for an entity.
+     *
+     * @param object $entity
+     */
+    public function dispatchEventsFor($entity)
+    {
+        foreach ($entity->releaseEvents() as $event) {
+            event($event);
+        }
+    }
+}

src/Core/Support/EventGenerator.php

@@ -0,0 +1,33 @@
+<?php namespace Flarum\Core\Support;
+
+trait EventGenerator
+{
+    /**
+     * @var array
+     */
+    protected $pendingEvents = [];
+
+    /**
+     * Raise a new event
+     *
+     * @param $event
+     */
+    public function raise($event)
+    {
+        $this->pendingEvents[] = $event;
+    }
+
+    /**
+     * Return and reset all pending events
+     *
+     * @return array
+     */
+    public function releaseEvents()
+    {
+        $events = $this->pendingEvents;
+
+        $this->pendingEvents = [];
+
+        return $events;
+    }
+}