Refactor - modularize and change build env

Build as node module (#14)

* New build and test workflow

closes #12

initial webpack stuffs

* removed lib/ from .gitignore

* added simple mocha test case

* added some build stuffs

* added lib/, removed dist/

* adding jsdom for testing

* use jsdom to test

* let mocha discover test cases

* added the rest of the tests

* updated travis config

* passes stuff

* update test scripts

* bin only needed in test

* added babel-cli to dev deps

* code cleanup

* no need to minify module

* added integration (bundle) testing

* no need for class, just include in module

* updated README

* fix bug in test

* don't need uglify

* removed example.html

* bump version