Patch — Incorrectly testing type of additional headers list.

[fs]

The documentation for Message.headers is wrong as it says 'headers -- A list of additional headers.'. In turbomail.Message self.headers is set to [] by default but in _process only tuples and dicts are handled.

The patch attached adds a test case for adding headers and changes the documentation to match the actual code.

[fs]

I fixed the Message class so now the use of lists is working, too. Apply this patch after applying the first one

[amcgregor]

Patches applied as of r31.