Make nsqjs work for non-coffee NodeJS projects

* Moved all coffee src from `lib` to `src`
* Removed `index.coffee` since it’s not useful
* Add `request` dependency in `package.json`
* Added `build`, `prepublish`, and `postpublish` hooks for compiling to
JS and cleaning up.
* Updated tests to import from `src` dir intead of `lib`
package.json fixes

* Bump the version
* Added CoffeeScript dependency (fix Travis)
* Added keywords
Merge pull request #7 from dudleycarr/js-compile

Make nsqjs work for non-coffeescript NodeJS projects