take out some template independent code to its own class

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

alib2abstraction/src/abstraction/CastAbstraction.hpp

...abstraction/src/abstraction/ImmediateValueAbstraction.hpp

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

alib2abstraction/src/abstraction/NormalizeAbstraction.hpp

alib2abstraction/src/abstraction/OperationAbstraction.hpp

alib2abstraction/src/abstraction/PackingAbstraction.hpp

alib2abstraction/src/abstraction/ReferenceAbstraction.hpp

alib2abstraction/src/abstraction/WrapperAbstraction.hpp

alib2raw/src/abstraction/RawReaderAbstraction.hpp

alib2raw/src/abstraction/RawWriterAbstraction.hpp

alib2str/src/abstraction/StringReaderAbstraction.hpp

alib2str/src/abstraction/StringWriterAbstraction.hpp

alib2xml/src/abstraction/XmlComposerAbstraction.hpp

alib2xml/src/abstraction/XmlParserAbstraction.hpp

alib2xml/src/abstraction/XmlTokensComposerAbstraction.hpp

alib2xml/src/abstraction/XmlTokensParserAbstraction.hpp