general: consolidate include sstream

alib2algo/src/automaton/simplify/MinimizeVerbose.h

alib2algo/src/automaton/simplify/RemoveUnused.h

alib2algo/src/automaton/simplify/Rename.h

alib2cli/src/lexer/Lexer.h

alib2common/src/PrimitiveRegistrator.cpp

alib2data/src/automaton/FSM/CompactDFA.h

alib2data/src/automaton/FSM/CompactNFA.h

alib2data/src/automaton/FSM/DFA.h

alib2data/src/automaton/FSM/EpsilonNFA.h

alib2data/src/automaton/FSM/ExtendedNFA.h

alib2data/src/automaton/FSM/MultiInitialStateEpsilonNFA.h

alib2data/src/automaton/FSM/MultiInitialStateNFA.h

alib2data/src/automaton/PDA/DPDA.h

alib2data/src/automaton/PDA/InputDrivenDPDA.h

alib2data/src/automaton/PDA/InputDrivenNPDA.h

alib2data/src/automaton/PDA/NPDA.h

alib2data/src/automaton/PDA/NPDTA.h

...2data/src/automaton/PDA/RealTimeHeightDeterministicDPDA.h

...2data/src/automaton/PDA/RealTimeHeightDeterministicNPDA.h

alib2data/src/automaton/PDA/SinglePopDPDA.h