Publish to npm

[jchavarri]

It would be great to publish a new version of the bundle that follows the published versions of bs-platform.

For this, the nightly builds could run npm show bs-platform version and check that against some file or field in package.json. If a new version is found, pull the tag branch from bucklescript repo and build again.

[ryyppy]

Currently I went the naive approach and dumped some compiled artifacts in a single github repository which can be found here: https://github.com/ryyppy/bs-platform-js-releases

For accessing the data, I am using the jsdelivr CDN github repo integration. Works pretty well so far.