algo: regexp: Move containsEpsilon and isEmpty into algorithms

alib2algo/src/conversions/re2fa/BrzozowskiDerivation.cpp

alib2algo/src/conversions/re2fa/GlushkovNFA.cpp

...lgo/src/conversions/re2rg/re2rrg/BrzozowskiDerivation.cpp

alib2algo/src/conversions/re2rg/re2rrg/GlushkovNFA.cpp

alib2algo/src/regexp/GlushkovTraversal.cpp

alib2algo/src/regexp/RegExpDerivation.cpp

alib2algo/src/regexp/RegExpEmpty.cpp

alib2algo/src/regexp/RegExpEmpty.h

alib2algo/src/regexp/RegExpEpsilon.cpp

alib2algo/src/regexp/RegExpEpsilon.h

alib2algo/src/regexp/RegExpOptimize.cpp

alib2algo/test-src/regexp/RegExpEmptyTest.cpp

alib2algo/test-src/regexp/RegExpEmptyTest.h

alib2algo/test-src/regexp/RegExpEpsilonTest.cpp

alib2algo/test-src/regexp/RegExpEpsilonTest.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