History bug fix

Fix a bug that caused history semantics to be followed when reentering a region that did not have history defined.

Fix a bug in transitions originating from pseudo states

Fixes #27

Added JSONInstance

Added a new class, JSONInstance to support serialisation of a state machine's active state configuration to/from JSON.

Other minor refactoring.

Upgrade to TypeScript 2.0

Upgraded to TypeScript 2.0; exploited a few new features and followed their best-practices.

A little additional re-factoring on the side.

Restructure directories

Restructure directory structure ready for DefinitelyTyped

Bug fixes

Fix text in trace output

Bug fixes

Fixed a bug whereby trace output was not correctly produced for state entry and state exit.

Refactoring

More refactoring and rename of defaultRegion method to getDefaultRegion.

Refactoring and minor changes to public API

Refactoring driven by the addition of the TypeScript module release (cleaning up the public API a little in TypeScript) and a change to make the random number generator API more consistent with the console API.

TypeScript modules

Enable state.js to be usable as a TypeScript module.