Correct bug on StatePair Equals and GetHashCode to be like dk.brics.automaton.
Add CultureInfo like AutoFixture project.
Add min/max length for Xeger matches.
Add regex intersection for Xeger.cs.
More complete equality comparer  for StateEqualityComparer.
Change State Transition fom IList to ISet (for HashSet because dk.brics.automaton used Set).

Signed-off-by: Arnaud Marant <arnaudmarant@gmail.com>