SEO Improvement using cran (urgent)

[martijnsublime]

For index

Please add for URL: https://www.datacamp.com
For bug reports you can refer to github
Rstudio does the same: https://www.dropbox.com/s/prqqsk5xsyhv62a/Screenshot%202016-09-11%2011.28.11.png?dl=0

For vignette
At DataCamp we build tools to learn data science interactively. See e.g. our online R tutorial to learn R Programming and our Python For Data Science tutorial to learn Python.

The tutorial package by DataCamp is a utility for knitr that is able to convert your static code chunks into an R editor where people can experiment. This is done with the help of DataCamp Light, a JavaScript library that converts HTML chunks with the proper formatting into iframes that house an interactive R session.

This vignette will discuss two ways of using the tutorial package: to create interactive ‘fiddles’ and to create fully-fledged coding exercise right inside your browser.

[filipsch]

Updates submitted to CRAN.