WSDL generation for non mandatory arguments

[Sławek Ehlert]

proposed fix is here https://github.com/stackforge/wsme/pull/4

Cannot generate WSDL when having functions with default value kwargs

For example:
```
    @expose([MyClass])
    @validate(unicode, unicode, unicode, unicode)
    def get(self, one, two, three, four = None):
        ...
```

[Sławek Ehlert (slafs)]

In addition I've made a pull request with some fixes for SOAP protocol

Here it is: https://github.com/stackforge/wsme/pull/6

Maybe when I'll have more time I'll try to setup this whole openstack/gerrit workflow and hopefully it'll get merged then.

[Stéphane Bisinger (kjir)]

The referenced changes were merged in quite some time ago. Thanks for the fixes!