Use the Cohttp.Request.status method to retrieve status

The direct field accessor is now abstract in Cohttp 0.12.0+
update version constraint in oasis (did not regenerate files)
Merge pull request #1 from avsm/cohttp-0.12.0+

Cohttp 0.12.0+ support
Pinned to version 1.0 of the graph API. Added some extra endpoints. Project rename
Merge branch 'master' of github.com:dominicjprice/sociaml-facebook-api
Package name changes
Tidied the code, added conv(json) to interfaces to allow endpoints to be converted to/from json
Update opam template to match new package names
Removed unecessary config
Licence modified to ISC/BSD