redesign register and unregister methods to save space

alib2abstraction/src/registry/CastRegistry.cpp

alib2abstraction/src/registry/CastRegistry.hpp

alib2abstraction/src/registry/ContainerRegistry.cpp

alib2abstraction/src/registry/ContainerRegistry.hpp

alib2abstraction/src/registry/ImmediateRegistry.cpp

alib2abstraction/src/registry/ImmediateRegistry.hpp

alib2abstraction/src/registry/NormalizeRegistry.cpp

alib2abstraction/src/registry/NormalizeRegistry.hpp

alib2abstraction/src/registry/ValuePrinterRegistry.cpp

alib2abstraction/src/registry/ValuePrinterRegistry.hpp

alib2raw/src/registry/RawReaderRegistry.cpp

alib2raw/src/registry/RawReaderRegistry.hpp

alib2raw/src/registry/RawWriterRegistry.cpp

alib2raw/src/registry/RawWriterRegistry.hpp

alib2str/src/registry/StringReaderRegistry.cpp

alib2str/src/registry/StringReaderRegistry.hpp

alib2str/src/registry/StringWriterRegistry.cpp

alib2str/src/registry/StringWriterRegistry.hpp

alib2xml/src/registry/XmlComposerRegistry.cpp

alib2xml/src/registry/XmlComposerRegistry.hpp