Refactor Flarum\Web and Flarum\Admin

- In order to be consistent with the Ember/LESS naming scheme, renamed
Flarum\Web to Flarum\Forum.
- Moved common classes into Flarum\Support so that Flarum\Admin doesn’t
depend on Flarum\Forum. Also moved Actor into Flarum\Support as it
doesn’t belong in the domain.

src/Forum/Middleware/LoginWithCookie.php

@@ -0,0 +1,28 @@
+<?php namespace Flarum\Forum\Middleware;
+
+use Flarum\Support\Actor;
+use Flarum\Core\Models\AccessToken;
+use Auth;
+use Closure;
+
+class LoginWithCookie
+{
+    protected $actor;
+
+    public function __construct(Actor $actor)
+    {
+        $this->actor = $actor;
+    }
+
+    public function handle($request, Closure $next)
+    {
+        if (($token = $request->cookie('flarum_remember')) &&
+            ($accessToken = AccessToken::where('id', $token)->first())) {
+            $this->actor->setUser($user = $accessToken->user);
+
+            $user->updateLastSeen()->save();
+        }
+
+        return $next($request);
+    }
+}