Migrate repo to the new WFDB organisation on GitHub?

[tompollard]

@ikarosilva we have created an organisation on GitHub to bring together the various WFDB repos/implementations into one place, and also to track things like the (forthcoming) WFDB specification documents.

As I think this repo is the primary Matlab implementation, perhaps it could be migrated too? I have sent you an invitation to join the organisation (https://github.com/wfdb).