Create a subpackage for utils
Split registry into subpackage
Update tests to reflect new project structure
Begin to implement push with new project structure
Refactor registry Push
Remove stdout from registry
Reenable docker push
Move httpClient within registry object
Upload images only when necessary
Allow to change login
Move authConfig from runtime to registry
Update tests to reflect new AuthConfig
Move getKernelVersion to utils package
Remove test file
Update utils_test.go
Disable registry unit tests
Merge pull request #608 from dotcloud/split_subpackage

* Project: Split the project into sub-packages