This is an example powerline configuration that I'm using at the moment. To use it, copy all of its content under ~/.config/powerline (or $XDG_CONFIG_HOME/powerline).

Detailed steps

$ pip install powerline-status xontrib-powerline-binding powerline-gitstatus git+https://github.com/shimtom/powerline-exitstatus
$ mkdir -p ~/.config/powerline
# standing in the root of the cloned repository
$ cp example-powerline-config/* ~/.config/powerline/
$ echo 'xontrib load powerline_binding' >> ~/.xonshrc

Orange underline issue

By default powerline uses non-breaking-spaces, but some terminals mark them (with orange underline for example). You can turn that off in your main powerline configuration by setting use_non_breaking_spaces to false. See the powerline documentation for reference: https://powerline.readthedocs.io/en/master/configuration/reference.html