Use wheels! yeah!

No more infinite time to re-create a virtualenv.
Merge branch 'kali/use-wheels' into develop
bump version

because we've updated it with mail fw.
Merge branch 'kali/bug/bump-bm-root-version' into develop
single pref win: move eip preferences to new combined preference window.
single pref win: enabled/disable services via preferences window, account page.
single pref win: moved password change UI to a separate window, opened from account page in preferences.
single pref win: gets the autopep8 beauty scrub.
single pref win: clean up vpn pref error displaying & don't show dummy gateways in case of error.
single pref win: move preference window tracking to PreferencesWindow
single pref win: minor linting & add changes file
single pref win: added shortcut to preferences
single pref win: ensure proper deletion of preference window pages.
single pref win: fix problems with cleaning up closed windows (lambdas were keeping the python object from getting garbage collected, and this keeps the old signal connections active)