Extending Muon to different platforms

by Lukas Appelhans for KDE

This proposal is about supporting Muon on more platforms, which means writing backend plugins for it using PackageKit and akabei. While it will give basic support for a lot of distributions, we will discuss, review and improve the current backend abstraction. I will also develop another abstraction layer for creating simple notifiers on whether a system needs to be updated, which can be used e.g. in a plasmoid.