Create inline interface tutorial with intro.js

[JaimieMurdock]

Create an inline tutorial system based on the help pages using intro.js

[ghost]

A few references for later:

For splash.mustache.html this link would be useful when working with the modal elements: https://stackoverflow.com/questions/25436147/how-to-highlight-bootstrap-modal-with-intro-js/46953549

For multipage tutorials these links are useful:
https://introjs.com/example/multi-page/index.html
https://github.com/usablica/intro.js/blob/master/example/multi-page/index.html

[ghost]

For documentation purposes:

• Issue I raised on Bootstrap-tour to fix redrawing issue
• Link to the fork that solved this issue