Rename CommonResult to Result.
Rename gophercloud.CommonResult references.
Use gophercloud.Result in objectstorage.
Rename Result.Resp to Result.Body.
Base a pagination.PageResult on gophercloud.Result.
Rename Result.Headers to Result.Header.

This way, it's consistent with http.Header in the response.
Merge pull request #240 from smashwilson/resultify

Add headers to the Result structure