Update README.md

Make changelog more consistent (but still, lots of versions missing)
Checkout https://gemnasium.com/npms/node-uuid/versions/1.4.0#changelog
most versions are empty.
Merge pull request #58 from gravis/patch-1

Update README.md
use mocha for testing
remove silly AMD nonsense

Use bundling tools to package however you want.
update README for new module name