Change project architecture

* Move all the H5BP source files into the `src/` directory and remove
  all external components that can be fetch via `npm`, namely: the
  Apache Server Configs, jQuery, and Normalize.css.

* Add `package.json`, and move to using `npm` for managing dependencies
  (for more information about `npm`, see: https://www.npmjs.org/doc/).

* Add `gulp` based build script to allows us to automatically create
  the distribution files as well as an archive that can then be attached
  to the release - https://github.com/blog/1547-release-your-software
  (for more information about gulp, see: http://gulpjs.com/).

* Add other miscellaneous files to help us in our development process:

   * `.editorconfig` - to define and maintain consistent coding styles
                       http://editorconfig.org/

   * `.jshintrc`     - to specify JSHint configuration options
                       http://www.jshint.com/docs/

   * `.travis.yml`   - to specify Travis CI configuration options
                       http://docs.travis-ci.com/

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These changes:

  * automate some of the tedious work (e.g.: updating the external
    components, updating some of the inline content such as version
    numbers, etc.)

  * will allow us to experiment more (e.g.: allow us to create different
    builds of H5BP, builds that can contain different components)

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Ref h5bp/html5-boilerplate#1563
Close h5bp/html5-boilerplate#1563
Add `dist/` directory