separate exception dir

alib2/src/FromXMLParser.hpp

alib2/src/FromXMLParsers.cpp

alib2/src/FromXMLParsers.h

alib2/src/ToXMLComposers.cpp

alib2/src/ToXMLComposers.h

alib2/src/alphabet/SymbolFromStringParser.cpp

alib2/src/alphabet/SymbolFromStringParser.h

alib2/src/alphabet/SymbolFromXMLParser.cpp

alib2/src/automaton/AutomatonException.h

alib2/src/automaton/AutomatonFromXMLParser.cpp

alib2/src/automaton/FSM/FiniteAutomatonFromStringParser.cpp

alib2/src/automaton/FSM/FiniteAutomatonToStringComposer.cpp

alib2/src/exception/AlibException.cpp

alib2/src/exception/AlibException.h

alib2/src/exception/ExceptionFeatures.h

alib2/src/exception/ExceptionFromXMLParser.cpp

alib2/src/exception/ExceptionFromXMLParser.h

alib2/src/exception/ExceptionToXMLComposer.cpp

alib2/src/exception/ExceptionToXMLComposer.h

alib2/src/label/LabelFromStringParser.cpp