Enhancement/bundle files

[JetJet13]

Changes & Additions

• added env property to data object passed to render pug views.
• added gulp tasks that bundle js and css files and adds them to a dist folder.
  • bundle:js
  • bundle:css
• removed js files that are no longer in use
  • smoothScroll.js
  • showAnswer.js

Note: Removed all.js and riotInit.js script tags from each pug file that renders a component.