finish refactoring xmlApi

alib2data/src/XmlApi.cpp

alib2data/src/XmlApi.hpp

alib2data/src/XmlApiBase.h

alib2data/src/alphabet/BarSymbol.cpp

alib2data/src/alphabet/BlankSymbol.cpp

alib2data/src/alphabet/BottomOfTheStackSymbol.cpp

alib2data/src/alphabet/EndSymbol.cpp

alib2data/src/alphabet/LabeledSymbol.cpp

alib2data/src/alphabet/RankedSymbol.cpp

alib2data/src/alphabet/StartSymbol.cpp

alib2data/src/alphabet/SubtreeWildcardSymbol.cpp

alib2data/src/alphabet/SymbolBase.h

alib2data/src/alphabet/SymbolPairSymbol.cpp

alib2data/src/alphabet/SymbolSetSymbol.cpp

alib2data/src/alphabet/UniqueSymbol.cpp

alib2data/src/alphabet/VariablesBarSymbol.cpp

alib2data/src/automaton/AutomatonBase.h

alib2data/src/automaton/FSM/CompactNFA.cpp

alib2data/src/automaton/FSM/DFA.cpp

alib2data/src/automaton/FSM/EpsilonNFA.cpp