Cannot find documentation for version Slim 1.6.7


I am creating a RESTful API on a server that has PHP 5.2.17 so I am forced to work with Slim 1.6.7.
I have pretty much a functioning API but I want to make sure I am sending the correct header with the correct status codes.

Any help will be much appreciated.

Perhaps something like this: Stable Branch Documentation [03 September 2012]