Publish parity.js to npmjs registry (#2978)

* Skeleton packages

* Publish parity.js package to npm

* [ci skip] js-precompiled 20161029-190427

* Extra step information

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* Use autToken for npmjs (cannot run headless in docker)

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* Correct package.json structure

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* Scope package to public

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* Start package version at 0.1.0

* Build proper umd library

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* Update build/release stage

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* Basic README.md to satisfy npmjs

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* CommonJs format

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* Update README.md

* update dependencies

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* Starting package version

* Build only on master