Added support of MathJax in tour steps (#39, #50) (Thanks @etiennebacher)
Updated intro.js to 3.2.1
Fix a bunch of URLs (Thanks @eddelbuettel for https://github.com/eddelbuettel/littler/blob/master/inst/examples/urlUpdate.r)
Fix issue with boolean introjs options (Thanks @leonawicz #16)
Upgrade to Intro.js 2.6.0
Add option to include Intro.js from CDN
Add data.position parameter to introBox
I()
.