make ExtendedNFA use UnboundedRegExpStructure

alib2algo/src/automaton/convert/ToRegExpStateElimination.cpp

alib2algo/src/automaton/convert/ToRegExpStateElimination.h

alib2algo/src/automaton/properties/AllEpsilonClosure.cpp

alib2algo/src/equations/LeftRegularEquationSolver.cpp

alib2algo/src/equations/RightRegularEquationSolver.cpp

alib2algo/src/regexp/properties/RegExpEmpty.cpp

alib2algo/src/regexp/properties/RegExpEmpty.h

alib2algo/src/regexp/properties/RegExpEpsilon.cpp

alib2algo/src/regexp/properties/RegExpEpsilon.h

alib2algo/src/regexp/simplify/RegExpOptimize.cpp

alib2algo/src/regexp/simplify/RegExpOptimize.h

alib2algo/src/regexp/transform/RegExpAlternate.cpp

alib2algo/src/regexp/transform/RegExpAlternate.h

alib2algo/src/regexp/transform/RegExpConcatenate.cpp

alib2algo/src/regexp/transform/RegExpConcatenate.h

alib2algo/src/regexp/transform/RegExpDerivation.h

alib2algo/src/regexp/transform/RegExpIterate.cpp

alib2algo/src/regexp/transform/RegExpIterate.h

alib2data/src/automaton/FSM/ExtendedNFA.cpp

alib2data/src/automaton/FSM/ExtendedNFA.h