Yes and Yes! As a metter of fact deployment hooks (both for packages and scripting like Chef) are available as private beta. Once we are done with the tests they will be released.
As for hooks: We have hooks and API to start a deployment after your git commit or CI gives us a go ahead and are working to add post-deploy hooks so you can chain up the deployment to other systems you have.
As for hooks: We have hooks and API to start a deployment after your git commit or CI gives us a go ahead and are working to add post-deploy hooks so you can chain up the deployment to other systems you have.