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/Seeders/PermissionsTableSeeder.php

@@ -0,0 +1,47 @@
+<?php  namespace Flarum\Core\Seeders;
+
+use Illuminate\Database\Seeder;
+use Flarum\Core\Models\Permission;
+
+class PermissionsTableSeeder extends Seeder {
+
+	/**
+	 * Run the database seeds.
+	 *
+	 * @return void
+	 */
+	public function run()
+	{
+        Permission::truncate();
+
+		$permissions = [
+
+            // Guests can view the forum
+            ['group.2' , 'forum'          , 'view'],
+            ['group.2' , 'forum'          , 'register'],
+
+            // Members can create and reply to discussions + edit their own stuff
+            ['group.3' , 'forum'          , 'startDiscussion'],
+            ['group.3' , 'discussion'     , 'editOwn'],
+            ['group.3' , 'discussion'     , 'reply'],
+            ['group.3' , 'post'           , 'editOwn'],
+
+            // Moderators can edit + delete stuff and suspend users
+            ['group.4' , 'discussion'     , 'delete'],
+            ['group.4' , 'discussion'     , 'edit'],
+            ['group.4' , 'post'           , 'delete'],
+            ['group.4' , 'post'           , 'edit'],
+            ['group.4' , 'user'           , 'suspend'],
+
+        ];
+        foreach ($permissions as &$permission) {
+            $permission = [
+                'grantee'    => $permission[0],
+                'entity'     => $permission[1],
+                'permission' => $permission[2]
+            ];
+        }
+        Permission::insert($permissions);
+	}
+
+}