Stack to PushdownStore rename

acompare2/src/AutomatonCompare.cpp

...algo/src/arbology/exact/ExactPatternMatchingAutomaton.cpp

...algo/src/arbology/exact/ExactSubtreeMatchingAutomaton.cpp

alib2algo/src/automaton/determinize/DeterminizeIDPDAPart.cxx

...2algo/src/automaton/determinize/DeterminizeRHDPDAPart.cxx

alib2algo/src/automaton/determinize/DeterminizeVPAPart.cxx

alib2algo/src/automaton/simplify/Normalize.cpp

alib2algo/src/automaton/simplify/Rename.cpp

alib2algo/src/automaton/transform/PDAToRHPDA.cpp

alib2algo/src/automaton/transform/RHPDAToPDA.cpp

alib2algo/src/grammar/convert/ToAutomaton.cpp

alib2algo/src/grammar/convert/ToAutomatonBottomUp.cpp

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

alib2algo/test-src/grammar/convert/GrammarCFGtoPDATest.cpp

alib2data/src/automaton/PDA/DPDA.cpp

alib2data/src/automaton/PDA/DPDA.h

alib2data/src/automaton/PDA/InputDrivenDPDA.cpp

alib2data/src/automaton/PDA/InputDrivenDPDA.h

alib2data/src/automaton/PDA/InputDrivenNPDA.cpp

alib2data/src/automaton/PDA/InputDrivenNPDA.h