We released a new feature called "Authentication" inside site level, in here you can create basic auth users so you can protect your sites with a username/password combination. This makes it easy if you have a dev domain for example, to protect this from the outer world. This feature is enabled for all paid plans and looks like this:
Also, we release a feature called "Quick Deploy", which makes it possible to deploy once you commit to the master branch. You can enable this with Bitbucket, Github, and Gitlab.