Add the Estado class.

The Estado class represents a state of a finite automata.
Add the EstadoAFN class.

The EstadoAFN class represents a state of a non-deterministic finite automata.
Add the EstadoAFD class.

The EstadoAFD class represents a state of a deterministic finite automata.
Add the Columna class.

The Columna class represents a column of a transition table.
Add the ColumnaAFD class.

The ColumnaAFD class represents a column of a transition table of a DFA.
Add the ColumnaAFN class.

The ColumnaAFN class represents a column of a transition table of a NFA.