Fix some bugs when invoking and using oonid.

- `config.global_options['no-geoip']` failed because of non-existing key.
- The second argument passed to `startNetTest()` was no string.
- `__init__()` in `YAMLReporter` used the current directory instead of the report directory.
Why are you checking for a header that is called "Cookie"? If what you are looking for are the cookies of the request then you can just access them with `self.request.cookies`. Though I did test this and it appears that the cookies do not contain the XSRF token, so I think they need to be passed via the header.