STORM-1992 Added artifacts to make storm.js into an npm package

[mzbyszynski]

Posting for feedback! Please let me know if I am on the right track. This PR relates to STORM-1992

$ mvn deploy -P npmjs

Would publish the package to npmjs.com as storm-multilang-js (I could not think of a better name that was not taken) along with the other deployments the build performs. It would have be manually executed right now because you need to have run npm login before hand to enter your credentials. I have not found a clean way to make this automated, but if that is a requirement I can probably get it working in an unclean way.

I published the package with a bogus version number here as an example: https://www.npmjs.com/package/storm-multilang-js

I added a stormjs utility to make it easier to call a js spout or bolt from a topology by taking care of some of the boilerplate. I also cleaned up storm.js a little bit by adding missing semi-colons and making string quotation consistent.

I'm unsure about the README.md file for the npm package. Should I add more to it or should it just point to documentation living somewhere else?

Thank you!

[ptgoetz]

My apologies for letting this go without review for so long.

+1