Sub/superproject adaptations
PersistentMap: untested SKV backend

Conflicts:
	CMake/FindPackages.cmake
	CMake/FindRequired.cmake
Fix build

Conflicts:
	.gitexternals
Add incomplete clang format
Servus: add API for continuous browsing
Update generated files
Merge branch 'master' into superproject
Update generated files
Merge branch 'superproject' of https://github.com/eile/Lunchbox into superproject
Merge branch 'master' into superproject

Conflicts:
	CMakeLists.txt
Merge pull request #165 from eile/superproject

Subproject cabable Lunchbox
Merge branch 'master' of https://github.com/Eyescale/Lunchbox