Merge pull request #75 from turbohz/patch-1

removedColumns in TableDiff

lib/Doctrine/DBAL/Schema/TableDiff.php

@@ -61,7 +61,7 @@ class TableDiff
     /**
      * All removed fields
      *
-     * @var array(string=>bool)
+     * @var array(string=>Column)
      */
     public $removedColumns = array();