add promoting visitor

alib2data/src/alphabet/SymbolBase.h

alib2data/src/automaton/AutomatonBase.h

alib2data/src/automaton/FSM/CompactNFA.h

alib2data/src/automaton/FSM/EpsilonNFA.h

alib2data/src/automaton/FSM/ExtendedNFA.h

alib2data/src/automaton/FSM/MultiInitialStateNFA.h

alib2data/src/automaton/FSM/NFA.cpp

alib2data/src/automaton/FSM/NFA.h

alib2data/src/container/ContainerBase.h

alib2data/src/grammar/GrammarBase.h

alib2data/src/label/LabelBase.h

alib2data/src/object/ObjectBase.h

alib2data/src/primitive/PrimitiveBase.h

alib2data/src/regexp/RegExpBase.h

alib2data/src/regexp/formal/FormalRegExpElement.h

alib2data/src/regexp/unbounded/UnboundedRegExpElement.h

alib2data/src/std/visitor.hpp

alib2data/src/string/StringBase.h

alib2data/test-src/std/StdVisitorTest.cpp

alib2data/test-src/std/StdVisitorTest.h