UnboundedRegExp to new alphabets + cleanup

alib2algo/src/automaton/convert/ToRegExpAlgebraic.cpp

alib2algo/src/regexp/convert/ToGrammarRightRGDerivation.cpp

alib2data/src/regexp/common/RegExpAlphabet.cpp

alib2data/src/regexp/common/RegExpAlphabet.h

alib2data/src/regexp/formal/FormalRegExp.cpp

alib2data/src/regexp/formal/FormalRegExpElement.h

alib2data/src/regexp/formal/FormalRegExpSymbol.h

alib2data/src/regexp/unbounded/UnboundedRegExp.cpp

alib2data/src/regexp/unbounded/UnboundedRegExp.h

...2data/src/regexp/unbounded/UnboundedRegExpAlternation.cpp

alib2data/src/regexp/unbounded/UnboundedRegExpAlternation.h

...ata/src/regexp/unbounded/UnboundedRegExpConcatenation.cpp

...2data/src/regexp/unbounded/UnboundedRegExpConcatenation.h

alib2data/src/regexp/unbounded/UnboundedRegExpElement.h

alib2data/src/regexp/unbounded/UnboundedRegExpEmpty.cpp

alib2data/src/regexp/unbounded/UnboundedRegExpEmpty.h

alib2data/src/regexp/unbounded/UnboundedRegExpEpsilon.cpp

alib2data/src/regexp/unbounded/UnboundedRegExpEpsilon.h

alib2data/src/regexp/unbounded/UnboundedRegExpIteration.cpp

alib2data/src/regexp/unbounded/UnboundedRegExpIteration.h