Split Board model into multiple classes

app/Api/Column.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace Kanboard\Api;
+
+/**
+ * Column API controller
+ *
+ * @package  api
+ * @author   Frederic Guillot
+ */
+class Column extends Base
+{
+    public function getColumns($project_id)
+    {
+        return $this->column->getAll($project_id);
+    }
+
+    public function getColumn($column_id)
+    {
+        return $this->column->getById($column_id);
+    }
+
+    public function updateColumn($column_id, $title, $task_limit = 0, $description = '')
+    {
+        return $this->column->update($column_id, $title, $task_limit, $description);
+    }
+
+    public function addColumn($project_id, $title, $task_limit = 0, $description = '')
+    {
+        return $this->column->create($project_id, $title, $task_limit, $description);
+    }
+
+    public function removeColumn($column_id)
+    {
+        return $this->column->remove($column_id);
+    }
+
+    public function changeColumnPosition($project_id, $column_id, $position)
+    {
+        return $this->column->changePosition($project_id, $column_id, $position);
+    }
+}