rename Api to XmlApi

acompare2/src/acompare.cpp

aconversions2/src/ConversionHandler.cpp

aconversions2/src/ConversionHandler.h

aconversions2/src/aconversion.cpp

aconvert2/src/aconvert.cpp

aderivation2/src/aderivation.cpp

adeterminize2/src/adeterminize.cpp

aecho2/src/aecho.cpp

aepsilon2/src/aepsilon.cpp

aintegral2/src/aintegral.cpp

alangop2/src/alangop.cpp

alib2algo/test-src/automaton/determinize/determinizeTest.cpp

...est-src/automaton/transform/AutomataConcatenationTest.cpp

alib2algo/test-src/automaton/transform/AutomataUnionTest.cpp

...o/test-src/automaton/transform/AutomatonIterationTest.cpp

...lgo/test-src/grammar/properties/GrammarPropertiesTest.cpp

alib2algo/test-src/regexp/toAutomaton/re2faTest.cpp

alib2data/src/XmlApi.cpp

alib2data/src/XmlApi.hpp

alib2data/src/alphabet/SymbolFromXMLParser.cpp