[Bundle]: udpate
[Changelog]
[Style] Tweaks and documentation
[Installer] Handle build configuration case insensitively
[TargetIntegrator] Remove unused method
[TargetIntegrator] Factor out XCConfig logic

Also includes some small fixes here and there
[XCConfigIntegrator] Migrate old installations
[XCConfigIntegrator] Downcase the name of the build configurations