auth
auth/client.go
Fix go vet, fix imports, render JSON errors, deprecate getBasicAuth. Fix logging functions in our test file that were causing go vet to report errors (and which would have obscured the test output). Move some imports around to make the imports more consistent and our pre-commit hook happy. Create a helper to render JSON errors, and actually render those errors when obtaining a token using a grant. Deprecate our custom getBasicAuth in favour of the new BasicAuth() method on net/http.*Request objects, which was introduced in Go 1.4 (meaning Go 1.4 is now a requirement for compiling this.)