Rewrite in Qml

This ended up more like a full rewrite. Notable improvements includes:

• Cleaner codebase without a big mainwindow.cpp including the whole application
• Use autogenerated dbus xml to cpp classes with some improvements to make them easier to use with QML
• Dynamic models what update only things that changed instead of resetting it all the time
• An unit page which display some information of an unit

Currently this bring it to feature parity with the old qwidget codebase but this should make it relatively easy to extend more in the future.