Gulp flow to update gh-pages

[gamell]

Use https://www.npmjs.com/package/gulp-gh-pages

Include Badges & buttons:

https://buttons.github.io/

Block of code:

<style>
    #badges a{
      padding: 0;
    }
  </style>
  <div id="badges">
    <a href="https://www.npmjs.com/package/markpress"><img src="https://img.shields.io/npm/dt/markpress.svg" alt="NPM downloads" /></a>
    <a class="github-button" href="https://github.com/gamell/markpress" data-icon="octicon-star" data-style="mega" data-count-href="/gamell/markpress/stargazers" data-count-api="/repos/gamell/markpress#stargazers_count" data-count-aria-label="# stargazers on GitHub" aria-label="Star gamell/markpress on GitHub">Star</a>
  </div>