Remove jQuery dependency in favor of 'component/dom' component.

* Replace `component/jquery` for `component/dom` as dependency at `component.json` file.
* Replace `o(..)` for `dom(..)` at `index.js` file.
* Fixed inconsintencies from differences between `jQuery` and `dom` APIs.

Also, `build.js` file size should get reduced by `~230kb` to `~37kb` given that jQuery is no longer a dependency.