Minor changes have been applied:
- Removed copyright info and GPL 3 license since Powerline is MIT (needs
confirmation from kovidgoyal before merge)
- The `powerline-client` script is renamed to `powerline`, and calls the
daemon or `powerline-render` (the previous `powerline`) to render
a statusline
- Minor coding style corrections to match the rest of the project
- Python 3 support is removed for now due to setuptools failing with
binary scripts
Todo:
- Automatically attempt to launch powerline-daemon the first time
powerline is run if the daemon isn't already running?
- pip install -e fails with binary files (it appears that pip recodes
the powerline binary to ASCII, the compiled powerline script must be
copied manually to ~/.local/bin after pip install -e has been run)