Merge pull request #382 from lwzm/fix-swagger-json-format

Escape control-characters in generated swagger

api.php

 			if ($i>0) echo ',';
 			echo '{';
 			echo '"name":"'.$table['name'].'",';
-			echo '"description":"'.$table['comments'].'"';
+			echo '"description":'.json_encode($table['comments']);
 			echo '}';
 		}
 		echo '],';