Refactory 2020 utilities

https://gitlab.ikp.kit.edu/AirShowerPhysics/corsika/-/wikis/Refactory2020

Please check and migrate any developments since commit 4d1baa1d in

• ./Framework/Utilities/Bit.h DB
• ./Framework/Utilities/sgn.h DB
• ./Framework/Utilities/CorsikaFenv.h DB
• ./Framework/Utilities/CorsikaData.h DB
• ./Framework/Utilities/COMBoost.h DB
• ./Framework/Utilities/quartic.h DB
• ./Framework/Utilities/Singleton.h DB
• ./Framework/Utilities/MetaProgramming.h DB