Add new Rake task to upload the BOSH dev release
Add new Rake task to upload the BOSH dev release

It has a dependency on the `release:create_dev_release` task so that you
can upload a new release for development in one command. The new task
has one argument that will rebase the release if it is anything truth-y.

barthy1/bosh,barthy1/bosh,barthy1/bosh,barthy1/bosh