Move budget outside of the core

The budget planning feature is now a plugin
See: https://github.com/kanboard/plugin-budget

app/Core/Base.php

@@ -35,7 +35,6 @@ use Pimple\Container;
  * @property \Model\Action                 $action
  * @property \Model\Authentication         $authentication
  * @property \Model\Board                  $board
- * @property \Model\Budget                 $budget
  * @property \Model\Category               $category
  * @property \Model\Color                  $color
  * @property \Model\Comment                $comment
@@ -43,7 +42,6 @@ use Pimple\Container;
  * @property \Model\Currency               $currency
  * @property \Model\DateParser             $dateParser
  * @property \Model\File                   $file
- * @property \Model\HourlyRate             $hourlyRate
  * @property \Model\LastLogin              $lastLogin
  * @property \Model\Link                   $link
  * @property \Model\Notification           $notification

app/Core/PluginBase.php

@@ -28,4 +28,20 @@ abstract class PluginBase extends Base
     {
         return array();
     }
+
+    /**
+     * Listen on internal events
+     *
+     * @access public
+     * @param  string   $event
+     * @param  callable $callback
+     */
+    public function on($event, $callback)
+    {
+        $container = $this->container;
+
+        $this->container['dispatcher']->addListener($event, function() use ($container, $callback) {
+            call_user_func($callback, $container);
+        });
+    }
 }

app/Core/PluginLoader.php

@@ -20,13 +20,6 @@ class PluginLoader extends Base
      */
     const TABLE_SCHEMA = 'plugin_schema_versions';
 
-    /**
-     * Plugin folder
-     *
-     * @var string
-     */
-    const PATH = __DIR__.'/../../plugins';
-
     /**
      * Scan plugin folder and load plugins
      *
@@ -34,8 +27,8 @@ class PluginLoader extends Base
      */
     public function scan()
     {
-        if (file_exists(self::PATH)) {
-            $dir = new DirectoryIterator(self::PATH);
+        if (file_exists(__DIR__.'/../../plugins')) {
+            $dir = new DirectoryIterator(__DIR__.'/../../plugins');
 
             foreach ($dir as $fileinfo) {
                 if (! $fileinfo->isDot() && $fileinfo->isDir()) {