This patch allows to set the text in the title of a terminal window. The idea is to allow snapcraft to set in the title which step is currently doing. This is a first proposal for https://github.com/canonical/craft-cli/issues/159 - [x] Have you followed the guidelines for contributing? - [x] Have you signed the [CLA](http://www.ubuntu.com/legal/contributors/)? - [x] Have you successfully run `tox`?