* stoped using url to pass the auth token and put it in the headers
* added newRequest method to VagrantCloudClient that sets json and auth headesr
* made VagrantCloudClient method pointers to avoid copies
Fixes the following vet reports:
post-processor/vagrant-cloud/client.go:81: arg resp for printf verb %s of wrong type: *net/http.Response
post-processor/vagrant-cloud/client.go:99: arg resp for printf verb %s of wrong type: *net/http.Response
post-processor/vagrant-cloud/client.go:131: arg resp for printf verb %s of wrong type: *net/http.Response
post-processor/vagrant-cloud/client.go:156: arg resp for printf verb %s of wrong type: *net/http.Response
post-processor/vagrant-cloud/client.go:175: arg resp for printf verb %s of wrong type: *net/http.Response
Adrien Delorme
Matthew Hooker
Emil Hessman
Jack Pearkes