* Added a lot more Luna packages. It is now possible to start Luna, complete the first use app, and use the system. ARM support still broken.
* Cleanup & testing fixes. Starting in a fresh qemu environment works, but isn't quite deterministic. See wiki page for details
* Upgrade Qt libs to 5.9.3
* Add test case to make sure we are always in sync with Alpine's QT
and update qt5-qtsensors, too.
* Remove qt5-qtquickcontrols2 (it's in Alpine now)
Contains everything from #940, except on top of master now.
Also added a postmarketos-ui-luna package to be a meta-
package for all of the Luna work.
Every component included here builds & runs, but isn't
functional without a handful more packages.
