Merge pull request #81 from eile/master

Update CMake subtree
Merge branch 'master' of https://github.com/Eyescale/Collage
Merge pull request #83 from tribal-tec/master

Fix #82: Reset barrier after all participants left
Update CMake subtree to fix bootstrapped Buildyard build
Merge pull request #85 from tribal-tec/master

Update CMake subtree to fix bootstrapped Buildyard build
Update generated files