update npm version badge

first 3.x release (3.0.1)

more readme

bump version number to 2.3.5 for transitions() fix

updated README and RELEASE_NOTES for 2.3.4

release version 2.3.3

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 #15)

updated links to new blog article