support for FKs, indented with spaces

lib/Doctrine/Import/Reader/Db.php

@@ -84,6 +84,13 @@ class Doctrine_Import_Reader_Db extends Doctrine_Import_Reader
             $table->addColumn($tableColumn);
         }
         $db->addTable($table);
+        if ($fks = $dataDict->listTableConstraints($tableName)){
+            foreach($fks as $fk){
+                $relation = new Doctrine_Schema_Relation();
+                $relation->setRelationBetween($fk['referencingColumn'],$fk['referencedTable'],$fk['referencedColumn']);
+                $table->setRelation($relation);
+            }
+        }
     }
 
 	return $schema;