Updates for release 1.6.0

Updates for release 1.5.0

doc: Create changelog for release 1.4.0

release: updates to metadata for next release

update package.json for new release

src: update package.json for release

Update version to 1.1.0
Add new contributors

Update version for release

Update version for latest n-api changes in 8.6.
that those changes were the last breaking changes in the API

Registration API was updated so bumped major version

Use old-style functions and use safe-buffer

* err => {} notation doesn't work on Node 4.
* Use Buffer.alloc polyfill from safe-buffer

PR-URL: nodejs#122
Fixes: nodejs#120
Reviewed-By: Michael Dawson <[email protected]>

sync the files from node for publishing

sync the files from node for publishing