v0.2.1

• Base members are now directly accessible through an Automaton reference via Deref coercion. Hence, Base functions can be called directly on the parent Automaton, e.g.

  let mut automaton = Automaton::with_initial_mode(SomeMode::new());
  automaton.some_base_fn();

• Simplified Automaton example demonstrating Modes that can hold onto &'a SomeType references.
• Added "Releases" section to README.md with a link to GitHub.