added release notes

Formal release of v2.2.0 - updated RELEASE_NOTES and links

Wrapped in self executing function to be more easily used with loader…

…s like `require.js` or `curl.js` (issue jakesgordon#15)

updated links to new blog article

added VERSION attribute to StateMachine source

added minified version state-machine.min.js

added final links to blog article and demo