Rework package split
The package split has been reworked and the package now has the following sub-packages:
- powerline: Merged from powerline, python-powerline, and powerline-common.
- powerline-fonts: Same as before.
- vim-powerline: Name changed from powerline-vim, to follow the naming convention of other packaged vim plugins
This is how Fedora packages Powerline, with the exception that they also have a docs- and a tmux-package. See: https://packages.fedoraproject.org/pkgs/powerline/powerline/
Additionally, add vim-powerline to the vim-plugins group, as it seems that is appropriate.