redesign abstraction file structure

Doxyfile

alib2abstraction/src/abstraction/AlgorithmAbstraction.hpp

...bstraction/src/abstraction/AnyaryOperationAbstraction.hpp

alib2abstraction/src/abstraction/MemberAbstraction.hpp

...2abstraction/src/abstraction/NaryOperationAbstraction.hpp

...traction/src/abstraction/NaryOperationAbstractionImpl.cpp

...traction/src/abstraction/NaryOperationAbstractionImpl.hpp

alib2abstraction/src/abstraction/PackingAbstraction.hpp

alib2abstraction/src/abstraction/ReferenceAbstraction.hpp

...ction/src/abstraction/ReturnValueOperationAbstraction.hpp

...abstraction/src/abstraction/ValueOperationAbstraction.hpp

...raction/src/abstraction/ValueOperationAbstractionImpl.hpp

alib2abstraction/src/abstraction/ValuePrinterAbstraction.hpp

...traction/src/abstraction/VariableOperationAbstraction.hpp

alib2abstraction/src/abstraction/WrapperAbstraction.hpp

alib2cli/src/registration/InputFileTypeRegistration.cpp

alib2cli/src/registration/OutputFileTypeRegistration.cpp

alib2xml/src/abstraction/XmlParserAbstraction.hpp