use emplace while working with Token deque

alib2data/src/alphabet/SymbolToXMLComposer.cpp

alib2data/src/automaton/AutomatonToXMLComposer.cpp

alib2data/src/container/ContainerToXMLComposer.cpp

alib2data/src/container/ContainerToXMLComposer.hpp

alib2data/src/exception/ExceptionToXMLComposer.cpp

alib2data/src/grammar/GrammarToXMLComposer.cpp

alib2data/src/graph/GraphToXMLComposer.cpp

alib2data/src/label/LabelToXMLComposer.cpp

alib2data/src/object/ObjectToXMLComposer.cpp

alib2data/src/primitive/PrimitiveToXMLComposer.cpp

alib2data/src/regexp/RegExpToXMLComposer.cpp

alib2data/src/sax/SaxParseInterface.cpp

alib2data/src/string/StringToXMLComposer.cpp