Adds Rule, Grammar, GrammarParser. Moves Symbol into namespace alphabet.

acat/src/acat.cpp

aconvert/src/aconvert.cpp

alib/.cproject

alib/src/AlibException.cpp

alib/src/AlibException.h

alib/src/alphabet/Symbol.cpp

alib/src/alphabet/Symbol.h

alib/src/automaton/Automaton.h

alib/src/automaton/FSM/FSM.cpp

alib/src/automaton/FSM/FSM.h

alib/src/automaton/PDA/PDA.h

alib/src/automaton/TM/TM.cpp

alib/src/automaton/TM/TM.h

alib/src/automaton/Transition.h

alib/src/automaton/UnknownAutomaton.h

alib/src/automaton/UnknownTransition.h

alib/src/automaton/exception/AutomatonException.cpp

alib/src/automaton/exception/AutomatonException.h

alib/src/grammar/Grammar.cpp

alib/src/grammar/Grammar.h