[Integration] Update
[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
[Installer] Use downcase to validate configurations
[Examples] Update integration
[Xcodeproj]: Fix issue for libraries with a space in the name
[PrefixHeader] Style fixes
[AggretateTarget] Expose specs by build configuration
[TargetEnvironmentHeader] Refactor
[Project] Add preprocessor definition for build configurations
[PrivatePodXcconfig] Add inherited to GCC_PREPROCESSOR_DEFINITIONS
[Project] Coherce preprocessor definitions to an array
[Integration] Disable xcproj in Xcodeproj
[Changelog]