* use .babelrc.js, compile bundled/non-bundled with loose mode

* add back helper, exclude typeof transform

Album example: fix holder.js calls

to fix the images

Structure examples with appropriate `<main>`, `<header>`, `<footer>`

Fix(docs): duplicate class in navbar docs

Remove not necessary condition in tooltip.js

v4 Collapse.js: Accordions with text-truncate causes the page to jump on close

This new section will replace the `hidden-*` class. https://v4-alpha.getbootstrap.com/layout/responsive-utilities/

More info can be found here at https://getbootstrap.com/docs/4.0/migration/#responsive-utilities

Dont use short jQuery methods in documentations