Hi,

I am getting an error when I try to use the HAL codec, as follows:

python2.7/site-packages/coreapi/transports/http.py", line 249, in _decode_result
result = codec.load(response.content, **options)
TypeError: load() got an unexpected keyword argument 'content_type'

Looking at http.py around line 249, I can see that if a content-type header was returned, it's inserted into options.

if 'content-type' in response.headers:
    options['content_type'] = response.headers['content-type']

Options is then unpacked and passed as parameters to codec.load(). The signature for the base codec is:

load(self, *args, **kwargs)

However the HAL codec has:

load(self, bytes, base_url=None)

This is unable to handle the content_type parameter. Changing this to the below gets everything working for me.

load(self, bytes, base_url=None, **kwargs)

Have I debugged this correctly? Happy to submit a PR if you agree that this correctly solves a valid issue.